Organic light-emitting device

ABSTRACT

An organic light-emitting device including a first electrode; a second electrode; and an organic layer between the first electrode and the second electrode, wherein the organic layer includes at least one first material and at least one second material, the first material being represented by one of Formulae 1-1 and 1-2, below, and the second material being represented by Formula 2, below: 
                         (A 21 ) n21 -(A 22 ) n22 -(A 23 ) n23 -(A 24 ) n24 .  &lt;Formula 2&gt;

CROSS-REFERENCE TO RELATED APPLICATION

Korean Patent Application No. 10-2014-0081216, filed on Jun. 30, 2014,in the Korean Intellectual Property Office, and entitled: “OrganicLight-Emitting Device,” is incorporated by reference herein in itsentirety.

BACKGROUND

1. Field

Embodiments relate to an organic light-emitting device.

2. Description of the Related Art

Organic light emitting devices are self-emission devices that have wideviewing angles, high contrast ratios, short response times, andexcellent brightness, driving voltage, and response speedcharacteristics, and produce full-color images.

The organic light-emitting device may include a first electrode on asubstrate, and a hole transport region, an emission layer, an electrontransport region, and a second electrode, which are sequentiallydisposed on the first electrode. Holes provided from the first electrodemay move toward the emission layer through the hole transport region,and electrons provided from the second electrode may move toward theemission layer through the electron transport region. Carriers, such asholes and electrons, may be recombined in the emission layer to produceexcitons. These excitons may change from an excited state to a groundstate, thereby generating light.

SUMMARY

Embodiments are directed to an organic light-emitting device

One or more embodiments include an organic light-emitting deviceincluding: a first electrode; a second electrode; and an organic layerthat is disposed between the first electrode and the second electrode,wherein the organic layer includes at least one selected from firstmaterials represented by any one of Formulae 1-1 and 1-2 and at leastone selected from second materials represented by Formula 2 below:

(A₂₁)_(n21)-(A₂₂)_(n22)-(A₂₃)_(n23)-(A₂₄)_(n24)  <Formula 2>

in Formulae 1-1, 1-2, 2, and 9-1 to 9-12,

A₁₁ and A₁₄ are each independently selected from groups represented byFormulae 9-1 to 9-12;

two adjacent groups among X₁₁ to X₁₈ are each independently a carbonatom corresponding to * in Formulae 9-1 to 9-12;

L₁₁ to L₁₃ are each independently selected from a substituted orunsubstituted C₆-C₆₀ arylene group, a substituted or unsubstitutedC₁-C₆₀ heteroarylene group, a substituted or unsubstituted divalentnon-aromatic condensed polycyclic group, and a substituted orunsubstituted divalent non-aromatic condensed heteropolycyclic group;

a11 to a13 are each independently selected from 0 and 1;

R₁₁ and R₁₂ are each independently selected from a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₁-C₆₀heteroaryl group, a substituted or unsubstituted monovalent non-aromaticcondensed polycyclic group, and a substituted or unsubstitutedmonovalent non-aromatic condensed heteropolycyclic group;

Y₁₁ and A₂₁ to A₂₄ are each independently selected from a substituted orunsubstituted C₆-C₆₀ aryl ring and a substituted or unsubstituted C₁-C₆₀heteroaryl ring; at least one selected from A₂₁ to A₂₄ is a substitutedor unsubstituted C₁-C₆₀ heteroaryl ring containing a nitrogen atom;

n11 may be selected from 1, 2, and 3;

n21 to n24 are each independently selected from 0, 1, 2, and 3;

the sum of n21, n22, n23, and n24 is 4 or more;

X₉₁ is selected from an oxygen atom, a sulfur atom, C(Q₁)(Q₂), andN(Q₁);

R₉₁ to R₉₃ are each independently selected from a hydrogen, a deuterium,—F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, anamino group, an amidino group, a hydrazine group, a hydrazone group, acarboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, aphosphoric acid or a salt thereof, a substituted or unsubstituted C₁-C₆₀alkyl group, a substituted or unsubstituted C₂-C₆₀ alkenyl group, asubstituted or unsubstituted C₂-C₆₀ alkynyl group, a substituted orunsubstituted C₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₁-C₁₀ heterocycloalkylgroup, a substituted or unsubstituted C₃-C₁₀ cycloalkenyl group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkenyl group, asubstituted or unsubstituted C₆-C₆₀ aryl group, a substituted orunsubstituted C₆-C₆₀ aryloxy group, a substituted or unsubstitutedC₆-C₆₀ arylthiogroup, a substituted or unsubstituted C₁-C₆₀ heteroarylgroup, a substituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted monovalentnon-aromatic condensed heteropolycyclic group;

b91 and b93 are each independently selected from 1, 2, 3, and 4;

b92 and b94 are each independently selected from 1 and 2;

d95 may be selected from 1, 2, 3, 4, 5, and 6;

at least one of substituents of the substituted C₆-C₆₀ arylene group,the substituted C₁-C₆₀ heteroarylene group, the substituted divalentnon-aromatic condensed polycyclic group, the substituted divalentnon-aromatic condensed heteropolycyclic group, the substituted C₆-C₆₀aryl group, the substituted C₁-C₆₀ heteroaryl group, the substitutedmonovalent non-aromatic condensed polycyclic group, the substitutedmonovalent non-aromatic condensed heteropolycyclic group, thesubstituted C₁-C₆₀ alkyl group, the substituted C₂-C₆₀ alkenyl group,the substituted C₂-C₆₀ alkynyl group, the substituted C₁-C₆₀ alkoxygroup, the substituted C₃-C₁₀ cycloalkyl group, the substituted C₁-C₁₀heterocycloalkyl group, the substituted C₃-C₁₀ cycloalkenyl group, thesubstituted C heterocycloalkenyl group, the substituted C₆-C₆₀ aryloxygroup, the substituted C₆-C₆₀ arylthio group, the substituted C₆-C₆₀aryl ring, and the substituted C₁-C₆₀ heteroaryl ring is selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₁-C₆₀ alkenyl group, a C₁-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed hetero-polycyclic group,—Si(Q₁₁)(Q₁₂)(Q₁₃);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic heterocondensed polycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₁-C₆₀alkenyl group, a C₁-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed hetero-polycyclic group, and —Si(Q₂₁)(Q₂₂)(Q₂₃);and

—Si(Q₃₁)(Q₃₂)(Q₃₃),

wherein Q₁, Q₂, Q₁₁ to Q₁₃, Q₂₁ to Q₂₃, and Q₃₁ to Q₃₃ are eachindependently selected from a C₁-C₆₀ alkyl group, a C₆-C₆₀ aryl group, aC₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclicgroup, and a monovalent non-aromatic condensed hetero-polycyclic group.

BRIEF DESCRIPTION OF THE DRAWING

Features will be apparent to those of skill in the art by describing indetail exemplary embodiments with reference to the attached drawing inwhich:

FIG. 1 illustrates a schematic cross-sectional view of an organiclight-emitting device according to an embodiment.

DETAILED DESCRIPTION

Example embodiments will now be described more fully hereinafter withreference to the accompanying drawing; however, they may be embodied indifferent forms and should not be construed as limited to theembodiments set forth herein. Rather, these embodiments are provided sothat this disclosure will be thorough and complete, and will fullyconvey exemplary implementations to those skilled in the art.

In the drawing FIGURE, the dimensions of layers and regions may beexaggerated for clarity of illustration. Like reference numerals referto like elements throughout.

As used herein, the term “and/or” includes any and all combinations ofone or more of the associated listed. Expressions such as “at least oneof,” when preceding a list of elements, modify the entire list ofelements and do not modify the individual elements of the list.

As used herein, the singular forms “a,” “an” and “the” are intended toinclude the plural forms as well, unless the context clearly indicatesotherwise.

It will be further understood that the terms “comprises” and/or“comprising” used herein specify the presence of stated features orcomponents, but do not preclude the presence or addition of one or moreother features or components.

It will be understood that when a layer, region, or component isreferred to as being “on” or “onto” another layer, region, or component,it may be directly or indirectly formed on the other layer, region, orcomponent. For example, intervening layers, regions, or components maybe present.

The expression “(an organic layer) includes at least one selected fromfirst materials” used herein may be interpreted as a case in which “(anorganic layer) includes identical first materials represented by Formula1 or two or more different first materials represented by Formula 1.”

The term “organic layer” used herein refers to a single layer and/or aplurality of layers disposed between the first electrode and the secondelectrode of the organic light-emitting device. A material included inthe “organic layer” is not limited to an organic material.

FIG. 1 illustrates a schematic cross-sectional view of an organiclight-emitting device 10 according to an embodiment. For example, theorganic light-emitting device 10 may include a first electrode 110, asecond electrode 190, and an organic layer 150 between the firstelectrode 110 and the second electrode 190. In FIG. 1, a substrate maybe additionally disposed under the first electrode 110 or above thesecond electrode 190. The substrate may be a glass substrate ortransparent plastic substrate, each with excellent mechanical strength,thermal stability, transparency, surface smoothness, ease of handling,and water repellency.

The first electrode 110 may be formed by depositing or sputtering amaterial for forming the first electrode on the substrate. When thefirst electrode 110 is an anode, the material for the first electrode110 may be selected from materials with a high work function tofacilitate hole injection. The first electrode 110 may be a reflectiveelectrode or a transmissive electrode. The material for the firstelectrode 110 may be a transparent and highly conductive material, andexamples of such a material may include indium tin oxide (ITO), indiumzinc oxide (IZO), tin oxide (SnO₂), and zinc oxide (ZnO). When the firstelectrode 110 is a semi-transmissive electrode or a reflectiveelectrode, as a material for forming the first electrode, at least oneof magnesium (Mg), aluminum (Al), aluminum-lithium (Al—Li), calcium(Ca), magnesium-indium (Mg—In), magnesium-silver (Mg—Ag) may be used.

The first electrode 110 may have a single-layer structure, or amulti-layer structure including two or more layers. For example, thefirst electrode 110 may have a three-layered structure of ITO/Ag/ITO,but the structure of the first electrode 110 is not limited thereto.

The organic layer 150 may be disposed on the first electrode 110. Theorganic layer 150 may include an emission layer.

The organic layer 150 may include at least one selected from firstmaterials represented by any one of Formulae 1-1 and 1-2 below and atleast one selected from second materials represented by Formula 2 below.For example, the organic layer 150 may include a first material and asecond material, the first material being represented by one of Formulae1-1 or 1-2 and the second material being represented by Formula 2.

(A₂₁)_(n21)-(A₂₂)_(n22)-(A₂₃)_(n23)-(A₂₄)_(n24)  <Formula 2>

A₁₁ to A₁₄ in Formulae 1-1 and 1-2 may be each independently selectedfrom Formulae 9-1 to 9-12.

In some embodiments, A₁₁ to A₁₄ in Formulae 1-1 and 1-2 may be eachindependently selected from Formulae 9-1, 9-3, and 9-6, but are notlimited thereto.

Two adjacent ones of X₁₁ to X₁₈ in Formulae 1-1 and 1-2 may be eachindependently a carbon atom corresponding to * in Formulae 9-1 to 9-12.

In some embodiments, in Formulae 1-1 and 1-2, X₁₁ and X₁₂ may be each acarbon atom corresponding to * in Formula 9-1, and X₁₃ and X₁₄ may beeach a carbon atom corresponding to * in Formula 9-1, but they are notlimited thereto.

In other embodiments, in Formula 1-2, X₁₅ and X₁₆ may be each a carbonatom corresponding to * in Formula 9-1, and X₁₇ and X₁₈ may be each acarbon atom corresponding to * in Formula 9-1, but they are not limitedthereto.

L₁₁ to L₁₃ in Formulae 1-1 and 1-2 may be each independently selectedfrom a substituted or unsubstituted C₆-C₆₀ arylene group, a substitutedor unsubstituted C₁-C₆₀ heteroarylene group, a substituted orunsubstituted divalent non-aromatic condensed polycyclic group, and asubstituted or unsubstituted divalent non-aromatic condensedheteropolycyclic group;

at least one substituent of the substituted C₆-C₆₀ arylene group,substituted C₁-C₆₀ heteroarylene group, substituted divalentnon-aromatic condensed polycyclic group, and substituted divalentnon-aromatic condensed heteropolycyclic group may be selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₁-C₆₀ alkenyl group, a C₁-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed hetero-polycyclic group,—Si(Q₁₁)(Q₁₂)(Q₁₃);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic heterocondensed polycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₁-C₆₀alkenyl group, a C₁-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed hetero-polycyclic group, and —Si(Q₂₁)(Q₂₂)(Q₂₃);and

—Si(Q₃₁)(Q₃₂)(Q₃₃),

Q₁₁ to Q₁₃, Q₂₁ to Q₂₃, and Q₃₁ to Q₃₃ may be each independentlyselected from a C₁-C₆₀ alkyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group.

For example, L₁₁ to L₁₃ in Formulae 1-1 and 1-2 may be eachindependently selected from a phenylenegroup, a naphthylene group, aphenanthrenylene group, a anthracenylene group, a triphenylenylenegroup, a pyrenylene group, a chrysenylene group, a pyrrolylene group, athiophenylene group, a furanylene group, an imidazolylene group, apyridinylene group, a pyrazinylene group, a pyrimidinylene group, anindolylene indolylene group, a quinolinylene group, an isoquinolinylenegroup, a benzoquinolinylene group, a phenanthridinylene group, anacridinylene group, a phenanthrolinylene group, a benzofuranylene group,a benzothiophenylene group, a triazolylene group, a tetrazolylene group,a triazinylene triazinylene group, a carbazolylene group, adibenzofuranylene group, and a dibenzothiophenylene group; and

a phenylene group, a naphthylene group, a phenanthrenylene group, ananthracenylene group, a triphenylenylene group, a pyrenylene group, achrysenylene group, a pyrrolylene group, a thiophenylene group, afuranylene group, an imidazolylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, an indolylene group, aquinolinylene group, an isoquinolinylene group, a benzoquinolinylenegroup, a phenanthridinylene group, an acridinylene group, aphenanthrolinylene group, a benzofuranylene group, a benzothiophenylenegroup, a triazolylene group, tetrazolylene group, a triazinylene group,a carbazolylene group, a dibenzofuranylene group, and adibenzothiophenylene group, each substituted with at least one selectedfrom deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid ora salt thereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkylgroup, a C₁-C₂₀ alkoxy group, a cyclopentyl group, a cyclohexyl group, acycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenylgroup, a pentalenyl group, an indenyl group, a naphthyl group, anazulenyl group, a heptalenyl group, an indacenyl group, acenaphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenylgroup, an anthracenyl group, a fluoranthenyl group, a triphenylenylgroup, a pyrenyl group, a chrysenyl group, a naphthacenyl group, apicenyl group, a perylenyl group, pentaphenyl group, a hexacenyl group,a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenylgroup, a pyrrolyl group, a thiophenyl group, a furanyl group, animidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolylgroup, an oxazolyl group, an isooxazolyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolylgroup, an indolyl group, an indazolyl group, a purinyl group, aquinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, aphthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, aquinazolinyl group, a cinnolinyl group, a carbazolyl group, aphenanthridinyl group, an acridinyl group, a phenanthrolinyl group, aphenazinyl group, a benzoimidazolyl group, a benzofuranyl group, abenzothiophenyl group, an isobenzothiazolyl group, a benzooxazolylgroup, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group,an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, adibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolylgroup, a thiadiazolyl group, and an imidazopyridinyl group, but they arenot limited thereto.

In some embodiments, L₁₁ to L₁₃ in Formulae 1-1 and 1-2 may be eachindependently selected from a phenylene group, a naphthylene group, aphenanthrenylene group, an anthracenylene group, a triphenylenylenegroup, a pyrenylene group, a chrysenylene group, a pyrrolylene group, athiophenylene group, a furanylene group, an imidazolylene group, apyridinylene group, a pyrazinylene group, a pyrimidinylene group, anindolylene group, a quinolinylene group, an isoquinolinylene group, abenzoquinolinylene group, a phenanthridinylene group, an acridinylenegroup, a phenanthrolinylene group, a benzofuranylene group, abenzothiophenylene group, a triazolylene group, a tetrazolylene group, atriazinylene group, a carbazolylene group, a dibenzofuranylene group,and a dibenzothiophenylene group; and

a phenylene group, a naphthylene group, a phenanthrenylene group, ananthracenylene group, a triphenylenylene group, a pyrenylene group, achrysenylene group, a pyrrolylene group, a thiophenylene group, afuranylene group, an imidazolylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, an indolylene group, aquinolinylene group, an isoquinolinylene group, a benzoquinolinylenegroup, a phenanthridinylene group, an acridinylene group, aphenanthrolinylene group, a benzofuranylene group, a benzothiophenylenegroup, a triazolylene group, a tetrazolylene group, a triazinylenegroup, a carbazolylene group, a dibenzofuranylene group and adibenzothiophenylene group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, aC₁-C₂₀ alkyl group, a phenyl group and a naphthyl group, but they arenot limited thereto.

In some embodiments, L₁₁ to L₁₃ in Formulae 1-1 and 1-2 may be eachindependently selected from a phenylene group, a naphthylene group, apyridinylene group, a pyrazinylene group, a pyrimidinylene group, aquinolinylene group, an isoquinolinylene group, a triazinylene group acarbazolylene group, a dibenzofuranylene group, and adibenzothiophenylene group; and

a phenylene group, a naphthylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a quinolinylene group, anisoquinolinylene group, a carbazolylene group, a dibenzofuranylenegroup, and a dibenzothiophenylene group, each substituted with at leastone selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitrogroup, a C₁-C₂₀ alkyl group, a phenyl group, and a naphthyl group, butthey are not limited thereto.

In some embodiments, L₁₁ to L₁₃ in Formulae 1-1 and 1-2 may be eachindependently selected from a phenylene group, a naphthylene group, apyridinylene group, a pyrazinylene group, a pyrimidinylene group, aquinolinylene group, an isoquinolinylene group, a triazinylene group acarbazolylene group, a dibenzofuranylene group, and adibenzothiophenylene group, but they are not limited thereto.

a11 in Formulae 1-1 and 1-2 indicates the number of L₁₁, and a11 may beselected from 0 and 1. When a11 is 0, (L₁₁)_(a11) is a single bond. Forexample, a11 in Formulae 1-1 and 1-2 may be 0, but is not limitedthereto.

a12 in Formulae 1-1 and 1-2 indicates the number of L₁₂, and a12 may beselected from 0 and 1. When a12 is 0, (L₁₂)_(a12) is a single bond. Forexample, a12 in Formulae 1-1 and 1-2 may be 0, but is not limitedthereto.

a13 in Formula 1-2 indicates the number of L₁₃, and a13 may be selectedfrom 0 and 1. When a13 is 0, (L₁₃)_(a13) is a single bond. For example,a13 in Formula 1-2 may be 0, but is not limited thereto.

R₁₁ and R₁₂ in Formulae 1-1 and 1-2 may be each independently selectedfrom a substituted or unsubstituted C₆-C₆₀ aryl group, a substituted orunsubstituted C₁-C₆₀ heteroaryl group, a substituted or unsubstitutedmonovalent non-aromatic condensed polycyclic group, and a substituted orunsubstituted monovalent non-aromatic condensed heteropolycyclic group;

at least one substituent of the substituted C₆-C₆₀ aryl group,substituted C₁-C₆₀ heteroaryl group, unsubstituted monovalentnon-aromatic condensed polycyclic group, and substituted monovalentnon-aromatic condensed heteropolycyclic group may be selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₁-C₆₀ alkenyl group, a C₁-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed hetero-polycyclic group,—Si(Q₁₁)(Q₁₂)(Q₁₃);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic heterocondensed polycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₁-C₆₀alkenyl group, a C₁-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed hetero-polycyclic group, and —Si(Q₂₁)(Q₂₂)(Q₂₃);and

—Si(Q₃₁)(Q₃₂)(Q₃₃),

Q₁₁ to Q₁₃, Q₂₁ to Q₂₃, and Q₃₁ to Q₃₃ may be each independentlyselected from a C₁-C₆₀ alkyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group.

For example, R₁₁ and R₁₂ in Formulae 1-1 and 1-2 may be eachindependently selected from a phenyl group, a pentalenyl group, anindenyl group, a naphthyl group, a azulenyl group, a heptalenyl group,an indacenyl group, an acenaphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,phenalenyl group, a phenanthrenyl group, a anthracenyl group, afluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenylgroup, a naphthacenyl group, a picenyl group, a perylenyl group, apentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenylgroup, a coronenyl group, a ovalenyl group, a pyrrolyl group, athiophenyl group, a furanyl group, a imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isoothiazolyl group, a oxazolyl group, anisooxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isooindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a carbazolyl group, a benzoquinolinyl group, a phthalazinylgroup, a naphthyridinyl group, a quinoxalinyl group, a quinazolinylgroup, a cinnolinyl group, a phenanthridinyl group, an acridinyl group,a phenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isoobenzothiazolylgroup, a benzooxazolyl group, an isobenzooxazolyl group, a triazolylgroup, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group,a benzocarbazolyl group, and a dibenzocarbazolyl group; and

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group,an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenylgroup, an anthracenyl group, a fluoranthenyl group, a triphenylenylgroup, a pyrenyl group, a chrysenyl group, a naphthacenyl group, apicenyl group, a perylenyl group, pentaphenyl group, a hexacenyl group,a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenylgroup, a pyrrolyl group, a thiophenyl group, a furanyl group, animidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolylgroup, an oxazolyl group, an isooxazolyl group, a pyridinyl group, apyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolylgroup, an indolyl group, an indazolyl group, a purinyl group, aquinolinyl group, an isoquinolinyl group, a carbazolyl group, abenzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, aphenanthridinyl group, an acridinyl group, a phenanthrolinyl group, aphenazinyl group, a benzoimidazolyl group, a benzofuranyl group, abenzothiophenyl group, an isobenzothiazolyl group, a benzooxazolylgroup, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group,an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, adibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolylgroup, and a dibenzocarbazolyl group, each substituted with at least oneselected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a pentalenylgroup, an indenyl group, a naphthyl group, an azulenyl group, aheptalenyl group, an indacenyl group, acenaphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isooxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, aphthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, aquinazolinyl group, a cinnolinyl group, a carbazolyl group, aphenanthridinyl group, an acridinyl group, a phenanthrolinyl group, aphenazinyl group, a benzoimidazolyl group, a benzofuranyl group, abenzothiophenyl group, an isobenzothiazolyl group, a benzooxazolylgroup, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group,an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, adibenzothiophenyl group, a benzocarbazolyl group, and adibenzocarbazolyl group, but they are not limited thereto.

In some embodiments, R₁₁ and R₁₂ in Formulae 1-1 and 1-2 may be eachindependently selected from a phenyl group, a naphthyl group, afluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, aphenanthrenyl group, an anthracenyl group, a fluoranthenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a quinolinyl group, anisoquinolinyl group, a quinazolinyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenylgroup, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenylgroup, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a quinolinyl group, an isoquinolinyl group, a quinazolinyl group,and a triazinyl group, each substituted with at least one selected froma deuterium, —F, —Cl, —Br, —I, a C₁-C₂₀ alkyl group, a phenyl group, anda naphthyl group, but they are not limited thereto.

In some embodiments, R₁₁ and R₁₂ in Formulae 1-1 and 1-2 may be eachindependently selected from a phenyl group, a naphthyl group, apyridinyl group, a pyrimidinyl group, a quinolinyl group, anisoquinolinyl group, a quinazolinyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a pyridinyl group, a pyrimidinylgroup, a quinolinyl group, an isoquinolinyl group, a quinazolinyl group,and a triazinyl group, each substituted with at least one selected froma deuterium, —F, —Cl, —Br, —I, a methyl group, a phenyl group, and anaphthyl group, but they are not limited thereto.

In other embodiments, R₁₁ and R₁₂ in Formulae 1-1 and 1-2 may be eachindependently a group represented by one of Formulae 4-31 to 4-38 below,but they are not limited thereto:

wherein in Formulae 4-31 to 4-38,

Z₁ is a hydrogen, a deuterium, —F, —Cl, —Br, —I, a methyl group, aphenyl group, or a naphthyl group;

d1 is selected from 1, 2, 3, 4, and 5; and

d2 is selected from 1, 2, 3, 4, 5, 6, and 7;

d3 is selected from 1, 2, 3, and 4;

d4 is selected from 1, 2, and 3;

d5 is selected from 1, 2, 3, 4, 5, and 6;

d6 may be selected from 1 and 2; and

* indicates a binding site to a neighboring atom.

In other embodiments, R₁₁ and R₁₂ in Formulae 1-1 and 1-2 may be eachindependently a group represented by one of Formulae 5-31 to 5-37 below,but they are not limited thereto:

wherein in Formulae 5-31 to 5-37, * indicates a binding site to aneighboring atom.

Y₁₁ in Formulae 1-1 and 1-2 may be selected from a substituted orunsubstituted C₆-C₆₀ aryl ring and a substituted or unsubstituted C₁-C₆₀heteroaryl ring;

at least one substituent of the substituted C₆-C₆₀ aryl ring andsubstituted C₁-C₆₀ heteroaryl ring may be selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₁-C₆₀ alkenyl group, a C₁-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed hetero-polycyclic group,—Si(Q₁₁)(Q₁₂)(Q₁₃);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic heterocondensed polycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₁-C₆₀alkenyl group, a C₁-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed hetero-polycyclic group, and —Si(Q₂₁)(Q₂₂)(Q₂₃);and

—Si(Q₃₁)(Q₃₂)(Q₃₃),

Q₁₁ to Q₁₃, Q₂₁ to Q₂₃, and Q₃₁ to Q₃₃ may be each independentlyselected from a C₆₀ alkyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group.

For example, Y₁₁ in Formula 1-1 may be selected from a benzene, anaphthalene, a pyridine, a pyrimidine, a quinoline, an isoquinoline, aquinazoline and a triazine; and

a benzene, a naphthalene, a pyridine, a pyrimidine, a quinoline, anisoquinoline, a quinazoline, and a triazine, each substituted with atleast one selected from a phenyl group and a naphthyl group, but is notlimited thereto.

In some embodiments, Y₁₁ in Formula 1-1 may be a benzene or a triazinesubstituted with a phenyl group, but is not limited thereto.

n11 In Formula 1-1 indicates the number of moieties that are representedby

and n11 may be selected from 1, 2, and 3. When n11 is 2 or more, aplurality of the moieties represented by

may be identical or different. For example, n11 in Formula 1-1 may beselected from 1 and 3, but is not limited thereto.

In Formulae 9-1 to 9-12, * indicates a carbon atom, and corresponds toany one selected from X₁₁ to X₁₈ in Formulae 1-1 and 1-2.

X₉₁ in Formulae 9-1 to 9-12 may be selected from an oxygen atom, asulfur atom, C(Q₁)(Q₂), and N(Q₁), and Q₁ and Q₂ are each independentlythe same as described below.

For example, X₉₁ in Formulae 9-1 to 9-12 may be N(Q₁), but is notlimited thereto.

R₉₁ to R₉₃ in Formulae 9-1 to 9-12 may be each independently selectedfrom a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a substituted or unsubstituted C₁-C₆₀ alkyl group, a substituted orunsubstituted C₂-C₆₀ alkenyl group, a substituted or unsubstitutedC₂-C₆₀ alkynyl group, a substituted or unsubstituted C₁-C₆₀ alkoxygroup, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, asubstituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthiogroup, asubstituted or unsubstituted C₁-C₆₀ heteroaryl group; a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, and asubstituted or unsubstituted monovalent non-aromatic condensedhetero-polycyclic group;

at least one substituent of the substituted C₆-C₆₀ aryl group,substituted C₁-C₆₀ heteroaryl group, unsubstituted monovalentnon-aromatic condensed polycyclic group, substituted monovalentnon-aromatic condensed heteropolycyclic group, substituted C₁-C₆₀ alkylgroup, substituted C₂-C₆₀ alkenyl group, substituted C₂-C₆₀ alkynylgroup, substituted C₁-C₆₀ alkoxy group, substituted C₃-C₁₀ cycloalkylgroup, substituted C₁-C₁₀ heterocycloalkyl group, substituted C₃-C₁₀cycloalkenyl group, substituted C₁-C₁₀ heterocycloalkenyl group,substituted C₆-C₆₀ aryloxy group, and substituted C₆-C₆₀ arylthio groupmay be selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₁-C₆₀ alkenyl group, a C₁-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed hetero-polycyclic group,—Si(Q₁₁)(Q₁₂)(Q₁₃);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic heterocondensed polycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₁-C₆₀alkenyl group, a C₁-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed hetero-polycyclic group, and —Si(Q₂₁)(Q₂₂)(Q₂₃);and

—Si(Q₃₁)(Q₃₂)(Q₃₃),

Q₁₁ to Q₁₃, Q₂₁ to Q₂₃ and Q₃₁ to Q₃₃ may be each independently selectedfrom a C₁-C₆₀ alkyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroarylgroup, a monovalent non-aromatic condensed polycyclic group, and amonovalent non-aromatic condensed heteropolycyclic group.

For example, R₉₁ to R₉₃ in Formulae 9-1 to 9-12 may be eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, acyano group, a nitro group, a C₁-C₆₀ alkyl group, and a C₆-C₆₀ arylgroup, but are not limited thereto.

b91 and b93 in Formulae 9-1 to 9-12 may be each independently selectedfrom 1, 2, 3, and 4; b92 and b94 may be each independently selected from1 and 2; b95 may be selected from 1, 2, 3, 4, 5, and 6.

Q₁ and Q₂ in Formulae 9-1 to 9-12 may be each independently selectedfrom a C₁-C₆₀ alkyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroarylgroup, a monovalent non-aromatic condensed polycyclic group, and amonovalent non-aromatic condensed heteropolycyclic group.

For example, Q₁ and Q₂ in Formulae 9-1 to 9-12 may be each independentlyselected from a C₆-C₆₀ aryl group, but is not limited thereto.

A₂₁ to A₂₄ in Formula 2 may be each independently selected from asubstituted or unsubstituted C₆-C₆₀ aryl ring, and a substituted orunsubstituted C₁-C₆₀ heteroaryl ring; at least one selected from A₂₁ toA₂₄ may be selected from a substituted or unsubstituted C₁-C₆₀heteroaryl ring containing one nitrogen atom;

at least one substituent of the substituted C₆-C₆₀ aryl ring andsubstituted C₁-C₆₀ heteroaryl ring may be selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₁-C₆₀ alkenyl group, a C₁-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed hetero-polycyclic group,—Si(Q₁₁)(Q₁₂)(Q₁₃);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic heterocondensed polycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₁-C₆₀alkenyl group, a C₁-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed hetero-polycyclic group, and —Si(Q₂₁)(Q₂₂)(Q₂₃);and

—Si(Q₃₁)(Q₃₂)(Q₃₃),

Q₁₁ to Q₁₃, Q₂₁ to Q₂₃, and Q₃₁ to Q₃₃ may be each independentlyselected from a C₁-C₆₀ alkyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group.

For example A₂₁ to A₂₄ in Formula 2 may be each independently selectedfrom a benzene, a naphthalene, a pyridine, a pyrimidine, a quinoline, anisoquinoline, a quinazoline, and a triazine;

a benzene, a naphthalene, a pyridine, a pyrimidine, a quinoline, anisoquinoline, a quinazoline, and a triazine, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, anitro group, a C₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, apyridyl group, a pyrimidyl group, and a triazinyl group; and

a benzene, a naphthalene, a pyridine, a pyrimidine, a quinoline, anisoquinoline, a quinazoline, and a triazine, each substituted with atleast one selected from a phenyl group, a naphthyl group, a pyridylgroup, a pyrimidyl group, and a triazinyl group, each substituted withat least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group,a nitro group, a C₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, apyridyl group, a pyrimidyl group, and a triazinyl group;

at least one selected from A₂₁ to A₂₄ is selected from a pyridine, apyrimidine, a quinoline, an isoquinoline, a quinazoline, and a triazine;

a pyridine, a pyrimidine, a quinoline, an isoquinoline, a quinazoline,and a triazine, each substituted with at least one selected from adeuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C₁-C₂₀alkyl group, a phenyl group, a naphthyl group, a pyridyl group, apyrimidyl group, and a triazinyl group;

a pyridine, a pyrimidine, a quinoline, an isoquinoline, a quinazoline,and a triazine, each substituted with at least one selected from aphenyl group, a naphthyl group, a pyridyl group, a pyrimidyl group, anda triazinyl group, each substituted with at least one selected from apyridyl group, a pyrimidyl group, and a triazinyl group; and

a pyridine, a pyrimidine, a quinoline, an isoquinoline, a quinazolineand a triazine, each substituted with at least one selected from apyridyl group, a pyrimidyl group, and a triazinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, a phenyl group,a naphthyl group, a pyridyl group, a pyrimidyl group, and a triazinylgroup, but are not limited thereto.

In some embodiments, A₂₁ to A₂₄ in Formula 2 may be each independentlyselected from a benzene, a pyridine, a pyrimidine, a quinoline, anisoquinoline, a quinazoline, and a triazine; and

a benzene, a pyridine, a pyrimidine, a quinoline, an isoquinoline, aquinazoline, and a triazine, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, amethyl group, an ethyl group, an n-propyl group, an iso-propyl group, ann-butyl group, an iso-butyl group, a sec-butyl group, a tert-butylgroup, a phenyl group, and a pyridyl group;

at least one selected from A₂₁ to A₂₄ is selected from a pyridine, apyrimidine, a quinoline, an isoquinoline, a quinazoline, and a triazine;and

a pyridine, a pyrimidine, a quinoline, an isoquinoline, a quinazolineand a triazine, each substituted with at least one selected from adeuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a methylgroup, an ethyl group, an n-propyl group, an iso-propyl group, ann-butyl group, an iso-butyl group, a sec-butyl group, a tert-butylgroup, a phenyl group, and a pyridyl group, but are not limited thereto.

In some embodiments, A₂₁ to A₂₄ in Formula 2 may be each independentlyselected from a benzene, a pyridine, a pyrimidine, a quinoline, anisoquinoline, a quinazoline, and a triazine; and

a benzene, a pyridine, a pyrimidine, a quinoline, an isoquinoline, aquinazoline, and a triazine, each substituted with at least one selectedfrom a cyano group, a methyl group, a phenyl group, and a pyridyl group;

at least one selected from A₂₁ to A₂₄ is selected from a pyridine, apyrimidine, a quinoline, an isoquinoline, a quinazoline, and a triazine;and

a pyridine, a pyrimidine, a quinoline, an isoquinoline, a quinazoline,and a triazine, each substituted with at least one selected from a cyanogroup, a methyl group, a phenyl group, and a pyridyl group, but are notlimited thereto.

n21 in Formula 2 indicates the number of A₂₁ and may be selected from 1,2 and 3. When n21 is 0, (A₂₁)_(n21) is a single bond. When n21 is 2 ormore, a plurality of A₂₁ may be identical or different. For example, n21may be selected from 1 and 2, but is not limited thereto.

n22 in Formula 2 refers to the number of A₂₂ and may be selected from 0,1, 2, and 3. When n22 is 0, (A₂₂)_(n22) is a single bond. When n22 is 2or more, a plurality of A₂₂ may be identical or different. For example,n22 may be selected from 1 and 2, but is not limited thereto.

n23 in formula 2 refers to the number of A₂₃ and may be selected from 0,1, 2, and 3.

When n23 is 0, (A₂₃)_(n23) is a single bond. When n23 is 2 or more, aplurality of R₂₃ may be identical or different. For example, n23 may beselected from 1 and 2, but is not limited thereto.

n24 in formula 2 refers to the number of A₂₄ and may be selected from 0,1, 2, and 3. When n24 is 0, (A₂₄)_(n24) is a single bond. When n24 is 2or more, a plurality of A₂₄ may be identical or different. For example,n24 may be selected from 1 and 2, but is not limited thereto.

The sum of n21, n22, n23, and n24 in Formula 2 may be 4 or more. Forexample, the sum of n21, n22, n23, and n24 in Formula 2 may be selectedfrom 4, 5, 6, and 7, but is not limited thereto.

In an embodiment, the second material may be represented by any one ofFormulae 2A and 2B below, but is not limited thereto.

In Formulae 2A and 2B,

X₂₁ may be CR₂₁ or a nitrogen atom (N); X₂₂ is CR₂₂ or N; X₂₃ is CR₂₃ orN;

L₂₁ to L₂₄ are each independently selected from

a phenylene group, a naphthalenyl group, a pyridinylene group, apyrimidinylene group, and a triazinylene group;

a phenylene group, a naphthalenyl group, a pyridinylene group, apyrimidinylene group, and a triazinylene group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, anitro group, a C₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, apyridyl group, a pyrimidyl group, and a triazinyl group; and

a phenylene group, a naphthalenyl group, a pyridinylene group, apyrimidinylene group, and a triazinylene group, each substituted with atleast one selected from a phenyl group, a naphthyl group, a pyridylgroup, a pyrimidyl group, and a triazinyl group, each substituted withat least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group,a nitro group, a C₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, apyridyl group, a pyrimidyl group, and a triazinyl group; and

a21 to a24 are each independently selected from 0 and 1;

R₂₁ to R₂₇ are each independently selected from a deuterium, —F, —Cl,—Br, —I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, a phenylgroup, a naphthyl group, a pyridyl group, a pyrimidyl group, and atriazinyl group; and

a phenyl group, a naphthyl group, a pyridyl group, a pyrimidyl group,and a triazinyl group, each substituted with at least one selected froma deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C₁-C₂₀alkyl group, a phenyl group, a naphthyl group, a pyridyl group, apyrimidyl group, and a triazinyl group.

In some embodiments, the second material may be represented by any oneof Formulae 2A-1 to 2A-5 and 2B-1 to 2B-5, but they are not limitedthereto.

In Formulae 2A-1 to 2A-5 and 2B-1 to 2B-5,

L₂₁ to L₂₄, a21 to a24, and R₂₁ to R₂₇ are the same as defined inFormulae 2A and 2B.

In some embodiments, the first material may be represented by any one ofFormulae 1-1A, 1-1B, 1-1C, and 1-2A below, and the second material maybe represented by one of Formulae 2A and 2B below, but they are notlimited thereto.

In Formulae 1A, 1-1B, 1-1C, 1-2A, 2A, and 2B,

Y₁₁, L₁₁, L₁₂, a11, a12, R₁₁, and R₁₂ are the same as defined inFormulae 1-1 and 1-2;

Q₁, R₉₁, R₉₃, b91, b92, and b93 are the same as defined in Formulae 9-1to 9-12;

L₁₃ is the same as defined in connection with L₁₃ in Formula 1-1;

a13 is the same as explained in connection with a13 in Formula 1-1;

X₂₁ is CR₂₁ or a nitrogen atom (N); X₂₂ is CR₂₂ or N; X₂₃ is CR₂₃ or N;

L₂₁ to L₂₄ are each independently selected from

a phenylene group, a naphthalenyl group, a pyridinylene group, apyrimidinylene group, and a triazinylene group;

a phenylene group, a naphthalenyl group, a pyridinylene group, apyrimidinylene group, and a triazinylene group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, anitro group, a C₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, apyridyl group, a pyrimidyl group, and a triazinyl group; and

a phenylene group, a naphthalenyl group, a pyridinylene group, apyrimidinylene group, and a triazinylene group, each substituted with atleast one selected from a phenyl group, a naphthyl group, a pyridylgroup, a pyrimidyl group, and a triazinyl group, each substituted withat least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group,a nitro group, a C₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, apyridyl group, a pyrimidyl group, and a triazinyl group; and

a21 to a24 are each independently selected from 0 and 1;

R₂₁ to R₂₇ are each independently selected from a deuterium, —F, —Cl,—Br, —I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, a phenylgroup, a naphthyl group, a pyridyl group, a pyrimidyl group, and atriazinyl group; and

a phenyl group, a naphthyl group, a pyridyl group, a pyrimidyl group,and a triazinyl group, each substituted with at least one selected froma deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C₁-C₂₀alkyl group, a phenyl group, a naphthyl group, a pyridyl group, apyrimidyl group, and a triazinyl group.

In some embodiments, the first material may be represented by Formula1-2B, and the second material may be represented by any one of Formulae2A-1 to 2A-5 and 2B-1 to 2B-5, but are not limited thereto.

In Formulae 1-1B, 2A-1 to 2A-5, and 2B-1 to 2B-5,

Y₁₁, L₁₁, and a11 are the same as defined in Formula 1-1;

Q₁, R₉₁, R₉₃, b91, and b93 are the same as defined in Formulae 9-1 to9-12; and

L₂₁ to L₂₄, a21 to a24, and R₂₁ to R₂₇ are the same as defined inFormulae 2A and 2B.

In some embodiments, the first material may be selected from Compounds 1to 173 below, and the second material may be selected from Compounds 201to 304, but they are not limited thereto.

The first material represented by Formula 1-1 or Formula 1-2, may be anamphiprotic material that includes a moiety having a hole transportproperty (e.g., a carbazole moiety) and a moiety having an electrontransport property (e.g., an N-containing heteroaryl moiety). Therefore,when the first material represented by Formula 1-1 or Formula 1-2 isincluded in an emission layer or a buffer layer of an organiclight-emitting device, charge balance of the organic light-emittingdevice may be appropriately maintained, and the efficiency of theorganic light-emitting device may be improved.

The second material represented by Formula 2 may have excellent electrontransport properties and high triplet energy level at the same time.Therefore, the second material may be appropriate for use as an electrontransport material, even in a blue organic light-emitting device and agreen organic light-emitting device. When an emission layer is patternedinto a red emission layer, a green emission layer, and a blue emissionlayer, and an electron transport layer containing the second material isdisposed as a common layer on the emission layer, the obtained theorganic light-emitting device may have a commercially available range ofcharacteristics.

The organic layer 150 may further include a hole transport regionbetween the first electrode and the emission layer. The organic layer150 may further include an electron transport region between theemission layer and the second electrode.

The hole transport region may include at least one selected from a holeinjection layer (HIL), a hole transport layer (HTL), a buffer layer(BL), and an electron blocking layer (EBL), and the electron transportregion may include at least one selected from a buffer layer, anelectron transport layer (ETL), and an electron injection layer (EIL),but is not limited thereto.

The hole transport region may have a single-layered structure formed ofa single material, a single-layered structure formed of a plurality ofdifferent materials, or a multi-layered structure having a plurality oflayers formed of a plurality of different materials.

For example, the hole transport region may have a single-layeredstructure formed of a plurality of different materials, or a structureof hole injection layer/hole transport layer, a structure of holeinjection layer/hole transport layer/buffer layer, a structure of holeinjection layer/buffer layer, a structure of hole transport layer/bufferlayer, or a structure of hole injection layer/hole transportlayer/electron blocking layer, wherein layers of each structure aresequentially stacked from the first electrode 110 in this stated order,but are not limited thereto.

When the hole transport region includes a hole injection layer, the holeinjection layer may be formed on the first electrode 110 by usingvarious methods, such as vacuum deposition, spin coating casting, aLangmuir-Blodgett (LB) method, ink-jet printing, laser-printing, orlaser-induced thermal imaging.

When a hole injection layer is formed by vacuum deposition, for example,the vacuum deposition may be performed at a temperature of a depositiontemperature of about 100 to about 500° C., at a vacuum degree of about10⁻⁸ to about 10⁻³ torr, and at a deposition rate of about 0.01 to about100 Å/sec in consideration of a compound for a hole injection layer tobe deposited, and the structure of a hole injection layer to be formed.

When a hole injection layer is formed by spin coating, the spin coatingmay be performed at a coating rate of about 2000 rpm to about 5000 rpm,and at a temperature of about 80° C. to 200° C. in consideration of acompound for a hole injection layer to be deposited, and the structureof a hole injection layer to be formed.

When the hole transport region includes a hole transport layer, the holetransport layer may be formed on the first electrode 110 or the holeinjection layer by using various methods, such as vacuum deposition,spin coating, casting, a LB method, ink-jet printing, laser-printing, orlaser-induced thermal imaging. When the hole transport layer is formedby vacuum deposition or spin coating, deposition and coating conditionsfor the hole transport layer may be determined by referring to thedeposition and coating conditions for the hole injection layer.

The hole transport region may include at least one selected fromm-MTDATA, TDATA, 2-TNATA, NPB, β-NPB, TPD, Spiro-TPD, Spiro-NPB, α-NPB,TAPC, HMTPD, 4,4′,4″-tris(N-carbazolyl)triphenylamine (TCTA),polyaniline/dodecylbenzenesulfonic acid (Pani/DBSA),poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS),polyaniline/camphor sulfonicacid (Pani/CSA),(polyaniline)/poly(4-styrenesulfonate) (PANI/PSS), a compoundrepresented by Formula 201 below, and a compound represented by Formula202 below:

wherein in Formulae 201 and 202,

L₂₀₁ to L₂₀₅ are each independently selected from a substituted orunsubstituted C₃-C₁₀ cycloalkylene group, a substituted or unsubstitutedC₁-C₁₀ heterocycloalkylene group, a substituted or unsubstituted C₃-C₁₀cycloalkenylene group, a substituted or unsubstituted C₁-C₁₀heterocycloalkenylene group, a substituted or unsubstituted C₆-C₆₀arylene group, a substituted or unsubstituted C₁-C₆₀ heteroarylenegroup, a substituted or unsubstituted divalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted divalentnon-aromatic condensed hetero-polycyclic group,

at least one substituent of the substituted C₃-C₁₀ cycloalkylene group,the substituted C₁-C₁₀ heterocycloalkylene group, the substituted C₃-C₁₀cycloalkenylene group, the substituted C₁-C₁₀ heterocycloalkenylenegroup, the substituted C₆-C₆₀ arylene group, the substituted C₁-C₆₀heteroarylene group, the substituted divalent non-aromatic condensedpolycyclic group, and the substituted divalent non-aromaticheterocondensed polycyclic group is selected from

a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, anamidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof,a sulfonic acid and a salt thereof, a phosphoric acid and a saltthereof, a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₂-C₆₀ alkynyl, and aC₁-C₆₀ alkoxy;

a C₁-C₆₀ alkyl group, a C₁-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, a halogen atom, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid or a salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed heteropolycyclic group, —N(Q₂₀₁)(Q₂₀₂),—Si(Q₂₀₃)(Q₂₀₄)(Q₂₀₅), and —B(Q₂₀₆)(Q₂₀₇);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from a deuterium, a halogen atom,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₁-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —N(Q₂₁₁)(Q₂₁₂), —Si(Q₂₁₃)(Q₂₁₄)(Q₂₁₅),and —B(Q₂₁₆)(Q₂₁₇); and

—N(Q₂₂₁)(Q₂₂₂), —Si(Q₂₂₃)(Q₂₂₄)(Q₂₂₅), and —B(Q₂₂₆)(Q₂₂₇); and

xa1 to xa4 may be each independently selected from 0, 1, 2, and 3;

xa5 may be selected from 1, 2, 3, 4, and 5; and

R₂₀₁ to R₂₀₄ are each independently selected from

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group, each substituted with at least one selected from adeuterium, a halogen atom, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid or asalt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀ cycloalkylgroup, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, aC₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxygroup, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, —N(Q₂₃₁)(Q₂₃₂),—Si(Q₂₃₃)(Q₂₃₄)(Q₂₃₅), and —B(Q₂₃₆)(Q₂₃₇);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group; and

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from a deuterium, a halogen atom,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₁-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —N(Q₂₄₁)(Q₂₄₂), —Si(Q₂₄₃)(Q₂₄₄)(Q₂₄₅),and —B(Q₂₄₆)(Q₂₄₇); and

Q₂₀₁ to Q₂₀₇, Q₂₁₁ to Q₂₁₇, Q₂₂₁ to Q₂₂₇, Q₂₃₁ to Q₂₃₇, and Q₂₄₁ to Q₂₄₇are each independently selected from

a hydrogen, a deuterium, a halogen atom, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid and a salt thereof, asulfonic acid and a salt thereof, a phosphoric acid and a salt thereof,a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, a halogen atom, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid or a salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, and a monovalentnon-aromatic condensed hetero-polycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group; and

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from a deuterium, a halogen atom,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₁-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, and a monovalent non-aromaticcondensed heteropolycyclic group.

wherein in Formulae 201 and 202,

L₂₀₁ to L₂₀₅ may be each independently selected from

a phenylene, a naphthylenylene, a fluorenylene, a spiro-fluorenylene, abenzofluorenylene, a dibenzofluorenylene, a phenanthrenylene, ananthracenylene, a pyrenylene, a chrysenylene, a pyridinylene, apyrazinylene, a pyrimidinylene, a pyridazinylene, a quinolinylene, anisoquinolinylene, a quinoxalinylene, a quinazolinylene, a carbazolylene,and a triazinylene; and

a phenylene group, a naphthylenylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, a anthracenylenegroup, a pyrenylene group, a chrysenylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a pyridazinylene group, aquinolinylene group, a isoquinolinylene group, a quinoxalinylene group,a quinazolinylene group, a carbazolylene group, and a triazinylenegroup, each substituted with at least one selected from a deuterium, ahalogen atom, a hydroxyl group, a cyano group, a nitro group, an aminogroup, an amidino group, a hydrazine group, a hydrazone group, acarboxyl group, and a salt thereof, a sulfonic acid, and a salt thereof,a phosphoric acid and a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenanthrenyl group, a anthracenyl group, a pyrenyl group, a chrysenylgroup, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, apyridazinyl group, a isoindolyl group, a quinolinyl group, aisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, and a triazinyl group;

xa1 to xa4 may be each independently 0, 1, or 2;

xa5 may be 1, 2, or 3;

R₂₀₁ to R₂₀₄ are each independently selected from

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group, eachsubstituted with at least one selected from a deuterium, a halogen atom,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, aphenyl group, a naphthyl group, a azulenyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group,a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and atriazinyl group, but they are not limited thereto.

The compound represented by Formula 201 may be represented by Formula201A:

For example, the compound represented by Formula 201 may be representedby Formula 201A-1 below, but is not limited thereto:

For example, the compound represented by Formula 202 may be representedby Formula 202A below, but is not limited thereto:

L₂₀₁ to L₂₀₃, xa1 to xa3, xa5, and R₂₀₂ to R₂₀₄ in Formulae 201A,201A-1, and 202A are already described above, R₂₁₁ may be the same asdefined in connection with R₂₁₂, and R₂₁₃ to R₂₁₆ may be eachindependently selected from hydrogen, deuterium, a halogen atom, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid group ora salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid ora salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, aC₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, and a non-aromaticcondensed polycyclic group.

For example, in Formulae 201A, 201A-1, and 202A,

L₂₀₁ to L₂₀₃ may be each independently selected from

a phenylene, a naphthylenylene, a fluorenylene, a spiro-fluorenylene, abenzofluorenylene, a dibenzofluorenylene, a phenanthrenylene, ananthracenylene, a pyrenylene, a chrysenylene, a pyridinylene, apyrazinylene, a pyrimidinylene, a pyridazinylene, a quinolinylene, anisoquinolinylene, a quinoxalinylene, a quinazolinylene, a carbazolylene,and a triazinylene; and

a phenylene group, a naphthylenylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, a anthracenylenegroup, a pyrenylene group, a chrysenylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a pyridazinylene group, aquinolinylene group, a isoquinolinylene group, a quinoxalinylene group,a quinazolinylene group, a carbazolylene group, and a triazinylenegroup, each substituted with at least one selected from a deuterium, ahalogen atom, a hydroxyl group, a cyano group, a nitro group, an aminogroup, an amidino group, a hydrazine group, a hydrazone group, acarboxyl group, and a salt thereof, a sulfonic acid, and a salt thereof,a phosphoric acid and a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenanthrenyl group, a anthracenyl group, a pyrenyl group, a chrysenylgroup, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, apyridazinyl group, a quinolinyl group, a isoquinolinyl group, aquinoxalinyl group, a quinazolinyl group, a carbazolyl group, and atriazinyl group;

xa1 to xa3 may be each independently 0 or 1;

R₂₀₃, R₂₁₁, and R₂₁₂ may be each independently selected from

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a Spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group, eachsubstituted with at least one selected from a deuterium, a halogen atom,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, aphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group;

R₂₁₃ and R₂₁₄ are each independently selected from

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, a halogen atom, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a phenyl group, a naphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group,a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and atriazinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a Spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group, eachsubstituted with at least one selected from a deuterium, a halogen atom,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, aphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

R₂₁₅ and R₂₁₆ may be each independently selected from

a hydrogen, a deuterium, a halogen atom, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid group or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, a halogen atom, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a phenyl group, a naphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group,a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and atriazinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group, eachsubstituted with at least one selected from a deuterium, a halogen atom,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, aphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group;

xa5 is 1 or 2.

R₂₁₃ and R₂₁₄ in Formulae 201A, and 201A-1 may bind to each other toform a saturated or unsaturated ring.

The compound represented by Formula 201, and the compound represented byFormula 202 may each include compounds HT1 to HT20 illustrated below,but are not limited thereto.

A thickness of the hole transport region may be in a range of about 100Å to about 10,000 Å, for example, about 100 Å to about 1000 Å. When thehole transport region includes both a hole injection layer and a holetransport layer, a thickness of the hole injection layer may be in arange of about 100 Å to about 10000 Å, for example, about 100 Å to about1000 Å, and a thickness of the hole transport layer may be in a range ofabout 50 Å to about 2000 Å, for example about 100 Å to about 1500 Å.When the thicknesses of the hole transport region, the hole injectionlayer, and the hole transport layer are within these ranges,satisfactory hole transporting characteristics may be obtained without asubstantial increase in driving voltage.

The hole transport region may further include, in addition to thesematerials, a charge-generation material for the improvement ofconductive properties. The charge-generation material may behomogeneously or heterogeneously dispersed in the hole transport region.

The charge-generation material may be, e.g., a p-dopant. The p-dopantmay be one of a quinone derivative, a metal oxide, and a cyanogroup-containing compound, but is not limited thereto. For example,non-limiting examples of the p-dopant are a quinone derivative, such astetracyanoquinonedimethane (TCNQ) or2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinonedimethane (F4-TCNQ); ametal oxide, such as a tungsten oxide or a molybdenum oxide, andCompound HT-D1 illustrated below, but are not limited thereto.

The hole transport region may further include, in addition to the holeinjection layer and the hole transport layer, at least one of a bufferlayer and an electron blocking layer. The buffer layer may compensatefor an optical resonance distance according to a wavelength of lightemitted from the emission layer, and light-emission efficiency of aformed organic light-emitting device may be improved. For use as amaterial included in the buffer layer, materials that are included inthe hole transport region may be used. The electron blocking layer mayhelp prevent injection of electrons from the electron transport region.

An emission layer may be formed on the first electrode 110 or the holetransport region by using various methods, such as vacuum deposition,spin coating, casting, a LB method, ink-jet printing, laser-printing, orlaser-induced thermal imaging. When the emission layer is formed byvacuum deposition or spin coating, deposition and coating conditions forthe emission layer may be determined by referring to the deposition andcoating conditions for the hole injection layer.

When the organic light-emitting device 10 is a full color organiclight-emitting device, the emission layer may be patterned into a redemission layer, a green emission layer, or a blue emission layer,according to a sub pixel. In some embodiments, the emission layer mayhave a stacked structure of a red emission layer, a green emissionlayer, and a blue emission layer, or may include a red-light emissionmaterial, a green-light emission material, and a blue-light emissionmaterial, which are mixed with each other in a single layer, to emitwhite light. According to another embodiment, the emission layer may bea white emission layer, and may further include a color converting layeror a color filter to turn white light into light of a desired color.

The emission layer may include a host and a dopant.

The emission layer may include at least one first material according toan embodiment, e.g., represented by Formula 1-1 or Formula 1-2. Forexample, the host may include at least one first material represented byFormula 1-1 or Formula 1-2.

When the emission layer includes at least one first material, anelectron transport layer may include at least one second material, butis not limited thereto. When the emission layer includes at least onefirst material and an electron transport layer includes at least onesecond material, the emission layer may be disposed adjacent to theelectron transport layer. For example, the emission layer may bedirectly adjacent to or may directly contact the electron transportlayer.

The emission layer may include at least one selected from TPBi, TBADN,ADN (also called as DNA), CBP, CDBP, TCP, SPPO, and MADN, aside from orin addition to the first material according to an embodiment.

The dopant may be at least one selected from a fluorescent dopant and aphosphorescent dopant.

The phosphorescent dopant may include an organometallic complexrepresented by Formula 401 below.

In Formula 401,

M may be selected from iridium (Ir), platinum (Pt), osmium (Os),titanium (Ti), zirconium (Zr), hafnium (Hf), europiium (Eu), terbium(Tb), and thulium (Tm);

X₄₀₁ to X₄₀₄ may be each independently nitrogen or carbon;

A₄₀₁ and A₄₀₂ rings may be each independently selected from asubstituted or unsubstituted benzene group, a substituted orunsubstituted naphthalene group, a substituted or unsubstitutedfluorenene group, a substituted or unsubstituted spiro-fluorenene group,a substituted or unsubstituted indene group, a substituted orunsubstituted pyrrol group, a substituted or unsubstituted thiophenegroup, a substituted or unsubstituted furan group, a substituted orunsubstituted imidazole group, a substituted or unsubstituted pyrazolegroup, a substituted or unsubstituted thiazole group, a substituted orunsubstituted isothiazole group, a substituted or unsubstituted oxazolegroup, a substituted or unsubstituted isoxazole group, a substituted orunsubstituted pyridine group, a substituted or unsubstituted pyrazinegroup, a substituted or unsubstituted pyrimidine group, a substituted orunsubstituted pyridazine group, a substituted or unsubstituted quinolinegroup, a substituted or unsubstituted isoquinoline group, a substitutedor unsubstituted benzoquinoline group, a substituted or unsubstitutedquinoxaline group, a substituted or unsubstituted quinazoline group, asubstituted or unsubstituted carbazol group, a substituted orunsubstituted benzoimidazole group, a substituted or unsubstitutedbenzofuran group, a substituted or unsubstituted benzothiophene group, asubstituted or unsubstituted isobenzothiophene group, a substituted orunsubstituted benzooxazole group, a substituted or unsubstitutedisobenzooxazole group, a substituted or unsubstituted triazole group, asubstituted or unsubstituted oxadiazole group, a substituted orunsubstituted triazine group, a substituted or unsubstituteddibenzofuran group, and a substituted or unsubstituted dibenzothiophenegroup;

at least one substituent of the substituted benzene group, substitutednaphthalene group, substituted fluorenene group, substitutedspiro-fluorenene group, substituted indene group, substituted pyrrolgroup, substituted thiophene group, substituted furan group, substitutedimidazole group, substituted pyrazole group, substituted thiazole group,substituted isothiazole group, substituted oxazole group, substitutedisoxazole group, substituted pyridine group, substituted pyrazine group,substituted pyrimidine group, substituted pyridazine group, substitutedquinoline group, substituted isoquinoline group, substitutedbenzoquinoline group, substituted quinoxaline group, substitutedquinazoline group, substituted carbazol group, substitutedbenzoimidazole group, substituted benzofuran group, substitutedbenzothiophene group, substituted isobenzothiophene group, substitutedbenzooxazole group, substituted isobenzooxazole group, substitutedtriazole group, substituted oxadiazole group, substituted triazinegroup, substituted dibenzofuran group, and substituted dibenzothiophenegroup may be selected from

a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, anamidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof,a sulfonic acid and a salt thereof, a phosphoric acid and a saltthereof, a C₁-C₆₀ alkyl, a C₂-C₆₀ alkenyl, a C₂-C₆₀ alkynyl, and aC₁-C₆₀ alkoxy;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, a halogen atom, a hydroxyl group, a cyano group, anitro group, an amino group, amidino, hydrazine, hydrazone, a carboxylicacid and a salt thereof, a sulfonic acid and a salt thereof, aphosphoric acid and a salt thereof, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, and —B(Q₄₀₆)(Q₄₀₇);

a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl, a C₁-C₁₀ heterocycloalkyl, a C₃-C₁₀ cycloalkenyl, aC₁-C₁₀ heterocycloalkenyl, a C₆-C₆₀ aryl, a C₆-C₆₀ aryloxy, a C₆-C₆₀arylthio, a C₁-C₆₀ heteroaryl, a monovalent non-aromatic condensedpolycyclic group, and a monovalent non-aromatic condensedheteropolycyclic group, each substituted with at least one selected fromdeuterium, a halogen atom, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid or asalt thereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl, aC₂-C₆₀ alkenyl, a C₁-C₆₀ alkynyl, a C₁-C₆₀ alkoxy, a C₃-C₁₀ cycloalkyl,a C₁-C₁₀ heterocycloalkyl, a C₃-C₁₀ cycloalkenyl, a C₁-C₁₀heterocycloalkenyl, a C₆-C₆₀ aryl, a C₆-C₆₀ aryloxy, a C₆-C₆₀ arylthio,a C₁-C₆₀ heteroaryl, a monovalent non-aromatic condensed polycyclicgroup, a monovalent non-aromatic condensed hetero-polycyclic group,—N(Q₄₁₁)(Q₄₁₂), —Si(Q₄₁₃)(Q₄₁₄)(Q₄₁₅), and —B(Q₄₁₆)(Q₄₁₇); and

—N(Q₄₂₁)(Q₄₂₂), —Si(Q₄₂₃)(Q₄₂₄)(Q₄₂₅), and —B(Q₄₂₆)(Q₄₂₇); and

L₄₀₁ is an organic ligand;

xc1 is 1, 2, or 3; and

xc2 is 0, 1, 2, or 3.

L₄₀₁ may be a monovalent, divalent, or trivalent organic ligand. Forexample, L₄₀₁ may be selected from a halogen ligand (for example, Cl orF), a diketone ligand (for example, acetylacetonate,1,3-diphenyl-1,3-propandionate, 2,2,6,6-tetramethyl-3,5-heptandionate,or hexafluoroacetonate), a carboxylic acid ligand (for example,picolinate, dimethyl-3-pyrazolecarboxylate, or benzoate), a carbonmonooxide ligand, an isonitrile ligand, a cyano ligand, and aphosphorous ligand (for example, phosphine, and phosphaite), but is notlimited thereto.

When A₄₀₁ in Formula 401 has two or more substituents, the substituentsof A₄₀₂ may bind to each other to form a saturated or unsaturated ring.

When A₄₀₂ in Formula 402 has two or more substituents, the substituentsof A₄₀₂ may bind to each other to form a saturated or unsaturated ring.

When xc1 in Formula 401 is two or more, a plurality of ligands

in Formula 401 may be identical or different. When xc1 in Formula 401 istwo or more, A₄₀₁ and A₄₀₂ may be respectively directly connected toA₄₀₁ and A₄₀₂ of other neighboring ligands with or without a linker (forexample, a C₁-C₅ alkylene, or —N(R′)—(wherein R′ may be a C₁-C₁₀ alkylgroup or a C₆-C₂₀ aryl group) or —C(═O)—) therebetween.

The phosphorescent dopant may include at least one of Compounds PD1 toPD74 below, but is not limited thereto:

According to another embodiment, the phosphorescent dopant may includePtOEP:

The fluorescent dopant may include at least one selected from DPAVBi,BDAVBi, TBPe, DCM, DCJTB, Coumarin 6, and C545T.

The fluorescent dopant may include a compound represented by Formula 501below.

wherein in Formula 501,

Ar₅₀₁ may be selected from

a naphthalene, a heptalene, a fluorenene, a spiro-fluorene, abenzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, ananthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, anaphthacene, a picene, a perylene, a pentaphene, and anindenoanthracene; and

a naphthalene group, a heptalene group, a fluorenene group, aspiro-fluorenene group, a benzofluorenene group, a dibenzofluorenenegroup, a phenalene group, a phenanthrene group, a anthracene group, afluoranthene group, a triphenylene group, a pyrene group, a chrysenegroup, a naphthacene group, a picene group, a perylene group, apentaphene group, and an indenoanthracene group, each substituted withat least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₆₀ alkyl group, a a C₂-C₆₀ alkenyl group, a a C₂-C₆₀alkynyl group, a a C₁-C₆₀ alkoxy, a C₃-C₁₀ cycloalkyl group, a a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, and —Si(Q₅₀₁)(Q₅₀₂)(Q₅₀₃) (whereinQ₅₀₁ to Q₅₀₃ are each independently selected from a hydrogen, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₁-C₆₀ aryl group, and a C₁-C₆₀heteroaryl group);

L₅₀₁ to L₅₀₃ may be understood by referring to the description providedherein in connection with L₂₀₁;

R₅₀₁ and R₅₀₂ are each independently selected from

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, a triazinyl group, adibenzofuranyl group, and a dibenzothiophenyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, aquinolinyl group, an isoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, a carbazolyl group, and a triazinyl group, eachsubstituted with at least one selected from a deuterium, a halogen atom,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, aphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, a triazinyl group, adibenzofuranyl group, and a dibenzothiophenyl group; and

xd1 to xd3 may be each independently selected from 0, 1, 2, and 3; and

xd4 may be selected from 1, 2, 3, and 4.

The fluorescent dopant may include at least one of Compounds FD1 to FD8:

An amount of the dopant in the emission layer may be, e.g., in a rangeof about 0.01 to about 15 parts by weight based on 100 parts by weightof the host, but is not limited thereto.

A thickness of the emission layer may be in a range of about 100 Å toabout 1,000 Å, for example, about 200 Å to about 600 Å. When thethickness of the emission layer is within this range, excellentlight-emission characteristics may be obtained without a substantialincrease in driving voltage.

Then, the electron transport region may be disposed on the emissionlayer.

The electron transport region may include at least one selected from abuffer layer, an electron transport layer (ETL), and an electroninjection layer, but is not limited thereto.

For example, the electron transport region may have an electrontransport layer alone, a structure of electron transport layer/electroninjection layer, or a structure of buffer layer/electron transportlayer/electron injection layer, wherein layers of each structure aresequentially stacked from the emission layer in this stated order, butis not limited thereto.

The electron transport region may include a buffer layer.

In general, the luminescent efficiency and lifespan of an organiclight-emitting device may be improved by optimizing balance of holes andelectrons in an emission layer. The buffer layer may allow electrons notto be injected too fast into the emission layer and may control movingspeed of electrons, thereby helping to improve the luminescentefficiency and lifespan of the organic light-emitting device.

The buffer layer may include the first material according to anembodiment. When the buffer layer includes the first material, theelectron transport layer may include the second material according to anembodiment, but is not limited thereto. When the buffer layer includesthe first material and the electron transport layer includes the secondmaterial, the buffer layer may be disposed adjacent to the electrontransport layer. For example, the buffer layer may be directly adjacentto or may directly contact the electron transport layer.

When the electron transport region includes the buffer layer, the bufferlayer may be formed on the emission layer by using various methods, suchas vacuum deposition, spin coating casting, a Langmuir-Blodgett (LB)method, ink-jet printing, laser-printing, or laser-induced thermalimaging. When the buffer layer is formed by vacuum deposition or spincoating, deposition and coating conditions for the buffer layer may bedetermined by referring to the deposition and coating conditions for thehole injection layer.

A thickness of the buffer layer may be in a range of about 20 Å to about1,000 Å, e.g., about 30 Å to about 300 Å. When the thickness of the holeblocking layer is within these ranges, the hole blocking layer may haveexcellent electron buffer characteristics without a substantial increasein driving voltage.

The electron transport region may include the electron transport layer.The electron transport layer may be formed on the emission layer or thebuffer layer by using various methods, for example vacuum deposition,spin coating casting, a LB method, ink-jet printing, laser-printing, orlaser-induced thermal imaging. When an electron transport layer isformed by vacuum deposition or spin coating, deposition and coatingconditions for the electron transport layer may be determined byreferring to the deposition and coating conditions for the holeinjection layer.

The electron transport layer may include, e.g., at least one secondmaterial represented by Formula 2.

A thickness of the electron transport layer may be in a range of about100 Å to about 1,000 Å, e.g., about 150 Å to about 500 Å. When thethickness of the electron transport layer is within the range describedabove, the electron transport layer may have satisfactory electrontransport characteristics without a substantial increase in drivingvoltage.

In an implementation, the electron transport layer may further include,in addition to the materials described above, a metal-containingmaterial.

The metal-containing material may include a Li complex. The Li complexmay include, for example, Compound ET-D1 (lithium quinolate, LiQ) orET-D2.

The electron transport region may include an electron injection layerthat allows electrons to be easily provided from the second electrode190.

The electron injection layer may be formed on the electron transportlayer by using various methods, such as vacuum deposition, spin coatingcasting, a LB method, ink-jet printing, laser-printing, or laser-inducedthermal imaging. When an electron injection layer is formed by vacuumdeposition or spin coating, deposition and coating conditions for theelectron injection layer may be determined by referring to thedeposition and coating conditions for the hole injection layer.

The electron injection layer may include at least one selected from,LiF, NaCl, CsF, Li₂O, BaO, and LiQ.

A thickness of the electron injection layer may be in a range of about 1Å to about 100 Å, e.g., about 3 Å to about 90 Å. When the thickness ofthe electron injection layer is within the range described above, theelectron injection layer may have satisfactory electron injectioncharacteristics without a substantial increase in driving voltage.

The second electrode 190 may be disposed on the organic layer 150 havingsuch a structure. The second electrode 190 may be a cathode which is anelectron injection electrode, and in this regard, a material for thesecond electrode 190 may be metal, an alloy, an electrically conductivecompound, and a mixture thereof, which have a relatively low workfunction. Examples of the material for the second electrode 190 mayinclude lithium (Li), magnesium (Mg), aluminum (Al), aluminum-lithium(Al—Li), calcium (Ca), magnesium-indium (Mg—In), and magnesium-silver(Mg—Ag). In an implementation, the material for forming the secondelectrode 190 may include ITO or IZO. The second electrode 190 may be areflective electrode, a semi-transmissive electrode, or a transmissiveelectrode.

Hereinbefore, the organic light-emitting device has been described withreference to FIG. 1, but is not limited thereto.

A C₁-C₆₀ alkyl group used herein refers to a linear or branchedaliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms, anddetailed examples thereof are a methyl group, an ethyl group, a propylgroup, an isobutyl group, a sec-butyl group, a ter-butyl group, a pentylgroup, an iso-amyl group, and a hexyl group. A C₁-C₆₀ alkylene groupused herein refers to a divalent group having the same structure as theC₁-C₆₀ alkyl group.

A C₁-C₆₀ alkoxy group used herein refers to a monovalent group having aformula of —OA₁₀₁ (here, A₁₀₁ is the C₁-C₆₀ alkyl group), and examplesthereof are a methoxy group, an ethoxy group, and an iso-propyloxy groupare included in the C₁-C₆₀ alkyl group

A C₂-C₆₀ alkenyl group used herein refers to a hydrocarbon group formedby substituting at least one carbon double bond in the middle orterminal of the C₂-C₆₀ alkyl group, and detailed examples thereof are anethenyl group, a prophenyl group, and a butenyl group. A C₂-C₆₀alkenylene group used herein refers to a divalent group having the samestructure as the C₂-C₆₀ alkenyl group.

A C₂-C₆₀ alkynyl group used herein includes at least one structurehaving carbon-carbon triple bond at the end or at the middle of theC₂-C₆₀ alkyl group, and examples thereof are an ethynyl group and apropynyl group are included in the C₂-C₆₀ alkyl group. A C₂-C₆₀alkynylene group used herein refers to a divalent group having the samestructure as the C₂-C₆₀ alkynyl group.

A C₃-C₁₀ cycloalkyl group used herein refers to a monovalent hydrocarbonmonocyclic group having 3 to 10 carbon atoms, and detailed examplesthereof are a cyclopropyl group, a cyclobutyl group, a cyclopentylgroup, a cyclohexyl group, and a cycloheptyl group. A C₃-C₁₀cycloalkylene group used herein refers to a divalent group having thesame structure as the C₃-C₁₀ cycloalkyl group.

A C₁-C₁₀ heterocycloalkyl group used herein refers to a monovalentmonocyclic group having at least one hetero atom selected from N, O, P,and S as a ring-forming atom and 1 to 10 carbon atoms, and detailedexamples thereof are a tetrahydrofuranyl group, and atetrahydrothiophenyl group. A C₁-C₁₀ heterocycloalkylene group usedherein refers to a divalent group having the same structure as theC₁-C₁₀ heterocycloalkyl group.

A C₃-C₁₀ cycloalkenyl group used herein refers to a monovalentmonocyclic group that has 3 to 10 carbon atoms and at least one doublebond in the ring thereof and does not have aromacity, and detailedexamples thereof are a cyclopentenyl group, a cyclohexenyl group, and acycloheptenyl group. A C₃-C₁₀ cycloalkenylene group used herein refersto a divalent group having the same structure as the C₃-C₁₀ cycloalkenylgroup.

A C₁-C₁₀ heterocycloalkenyl group used herein refers to a monovalentmonocyclic group that has at least one hetero atom selected from N, O,P, and S as a ring-forming atom, 1 to 10 carbon atoms, and at least onedouble bond in its ring. Detailed examples of the C₁-C₁₀heterocycloalkenyl group are a 2,3-hydrofuranyl group and a2,3-hydrothiophenyl group. A C₁-C₁₀ heterocycloalkenylene group usedherein refers to a divalent group having the same structure as theC₁-C₁₀ heterocycloalkenyl group.

A C₆-C₆₀ aryl group used herein refers to a monovalent group having acarbocyclic aromatic system of 6 to 60 carbon atoms, and a C₆-C₆₀arylene group refers to a divalent group having a carbocyclic aromaticsystem of 6 to 60 carbon atoms. Detailed examples of the C₆-C₆₀ arylgroup are a phenyl group, a naphthyl group, an anthracenyl group, aphenanthrenyl group, a pyrenyl group, and a chrysenyl group. When theC₆-C₆₀ aryl group and the C₆-C₆₀ arylene group each include two or morerings, the rings may be fused to each other.

A C₁-C₆₀ heteroaryl group used herein contains at least one hetero atomselected from N, O, P, and S as a ring-forming atom and refers to amonovalent group having a carbocyclic aromatic system of 1 to 60 carbonatoms. A C₁-C₆₀ heteroarylene group contains at least one hetero atomselected from N, O, P, and S as a ring-forming atom and refers to adivalent group having a carbocyclic aromatic system of 1 to 60 carbonatoms. Examples of the C₁-C₆₀ heteroaryl group are a pyridinyl group, apyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinylgroup, a quinolinyl group, and an isoquinolinyl group. When the C₁-C₆₀heteroaryl group and the C₁-C₆₀ heteroarylene group each include two ormore rings, the rings may be fused to each other.

A C₆-C₆₀ aryloxy group used herein indicates —OA₁₀₂ (wherein A₁₀₂ is theC₆-C₆₀ aryl group), and a C₆-C₆₀ arylthio group used herein indicates—SA₁₀₃ (wherein A₁₀₃ is the C₆-C₆₀ aryl group).

A monovalent non-aromatic condensed polycyclic group used herein refersto a monovalent group that has two or more rings condensed to eachother, only carbon atoms (for example, the number of carbon atoms may bein a range of 8 to 60) as a ring forming atom, and non-aromacity in theentire molecular structure. An example of the monovalent non-aromaticcondensed polycyclic group is a fluorenyl group. A divalent non-aromaticcondensed polycyclic group used herein refers to a divalent group havingthe same structure as the monovalent non-aromatic condensed polycyclicgroup.

A monovalent non-aromatic condensed hetero-polycyclic group used hereinrefers to a monovalent group that has two or more rings condensed toeach other, has a heteroatom selected from N, O, P, and S, other thancarbon atoms (for example, the number of carbon atoms may be in a rangeof 1 to 60), as a ring forming atom, and has non-aromacity in the entiremolecular structure. An example of the monovalent non-aromatic condensedhetero-polycyclic group is a carbazolyl group. A divalent non-aromaticcondensed hetero-polycyclic group used herein refers to a divalent grouphaving the same structure as the monovalent non-aromatic condensedhetero-polycyclic group.

The term “Ph” used herein refers to phenyl group, the term “Me” usedherein refers to methyl group, the term “Et” used herein refers to ethylgroup, and the term “ter-Bu” or “But” used herein refers to tert-butyl.

Hereinafter, an organic light-emitting device according to an embodimentwill be described in detail with reference to Synthesis Examples andExamples.

The following Examples and Comparative Examples are provided in order tohighlight characteristics of one or more embodiments, but it will beunderstood that the Examples and Comparative Examples are not to beconstrued as limiting the scope of the embodiments, nor are theComparative Examples to be construed as being outside the scope of theembodiments. Further, it will be understood that the embodiments are notlimited to the particular details described in the Examples andComparative Examples.

EXAMPLE 1-1

An anode was prepared by cutting a Corning 15 Ωcm² (1,200 Å) ITO glasssubstrate to a size of 50 mm×50 mm×0.7 mm, ultrasonically cleaning theglass substrate by using isopropyl alcohol and pure water for 5 minuteseach, and then irradiating UV light for 30 minutes thereto and exposingto ozone to clean. Then, the anode was loaded into a vacuum depositionapparatus.

HT3 was vacuum deposited on the substrate to form a hole transport layerhaving a thickness of 600 Å. Then, Compound 1 and Ir(ppy)₃ wereco-deposited at a weight ratio of 95:5 to form an emission layer havinga thickness of 300 Å.

Thereafter, Compound 201 and LiQ were deposited at a weight ratio of50:50 on the emission layer to form an electron transport layer having athickness of 400 Å, LiF was deposited on the electron transport layer toform an electron injection layer having a thickness of 10 Å, and Al wasvacuum deposited to form a cathode having a thickness of 2,000 Å,thereby completing the manufacture of an organic light-emitting device.

EXAMPLE 1-2

An organic light-emitting device was manufactured in the same manner asin Example 1-1, except that in forming an electron transport layer,Compound 202 was used instead of Compound 201.

EXAMPLE 1-3

An organic light-emitting device was manufactured in the same manner asin Example 1-1, except that in forming an electron transport layer,Compound 203 was used instead of Compound 201.

EXAMPLE 1-4

An organic light-emitting device was manufactured in the same manner asin Example 1-1, except that in forming an electron transport layer,Compound 204 was used instead of Compound 201.

EXAMPLE 1-5

An organic light-emitting device was manufactured in the same manner asin Example 1-1, except that in forming an emission layer, Compound 3 wasused instead of Compound 1.

EXAMPLE 1-6

An organic light-emitting device was manufactured in the same manner asin Example 1-1, except that in forming an emission layer, Compound 3 wasused instead of Compound 1, and Compound 202 was used instead ofCompound 201.

EXAMPLE 1-7

An organic light-emitting device was manufactured in the same manner asin Example 1-1, except that in forming an emission layer, Compound 3 wasused instead of Compound 1, and Compound 203 was used instead ofCompound 201

EXAMPLE 1-8

An organic light-emitting device was manufactured in the same manner asin Example 1-1, except that in forming an emission layer, Compound 3 wasused instead of Compound 1, and Compound 204 was used instead ofCompound 201

COMPARATIVE EXAMPLE 1-1

An organic light-emitting device was manufactured in the same manner asin Example 1-1, except that in forming an emission layer, Compound SPPOwas used instead of

Compound 1, and in forming an electron transport layer, Alq₃ was usedinstead of Compound 201 and LiQ.

COMPARATIVE EXAMPLE 1-2

An organic light-emitting device was manufactured in the same manner asin Example 1-1, except that in forming an emission layer, Compound SPPOwas used instead of Compound 1, and in forming an electron transportlayer, Compound A was used instead of Compound 201.

COMPARATIVE EXAMPLE 1-3

An organic light-emitting device was manufactured in the same manner asin Example 1-1, except that in forming an emission layer, SPPO was usedinstead of Compound 1.

COMPARATIVE EXAMPLE 1-4

An organic light-emitting device was manufactured in the same manner asin Example 1-1, except that in forming an electron transport layer, Alq₃was used instead of Compound 201.

COMPARATIVE EXAMPLE 1-5

An organic light-emitting device was manufactured in the same manner asin Example 1-1, except that in forming an electron transport layer, onlyCompound 201 was used instead of Compound 201 and LiQ.

EXAMPLE 1-9

An anode was manufactured by cutting a Corning 15 Ωcm² (1,200 Å) ITOglass substrate to a size of 50 mm×50 mm×0.7 mm, ultrasonically cleaningthe glass substrate by using isopropyl alcohol and pure water for 5minutes each, and then irradiating UV light for 30 minutes thereto andbeing exposed to ozone to clean. Then, the anode was loaded into avacuum deposition apparatus.

HT3 was vacuum deposited on the substrate to form a hole transport layerhaving a thickness of 600 Å. Then, SPPO and Ir(ppy)₃ were co-depositedat a weight ratio of 95:5 to form an emission layer having a thicknessof 300 Å.

Thereafter, Compound 2 was deposited on the emission layer to form abuffer layer having a thickness of 100 Å. Compound 201 and LiQ wereco-deposited at a weight ratio of 50:50 on the buffer layer to form anelectron transport layer having a thickness of 300 Å, LiF was depositedon the electron transport layer to form an electron injection layerhaving a thickness of 10 Å, and Al was vacuum deposited to form acathode having a thickness of 2000 Å, thereby completing the manufactureof an organic light-emitting device.

EXAMPLE 1-10

An organic light-emitting device was manufactured in the same manner asin Example 1-9, except that in forming a buffer layer, Compound 3 wasused instead of Compound 2.

EXAMPLE 1-11

An organic light-emitting device was manufactured in the same manner asin Example 1-9, except that in forming an electron transport layer,Compound 202 was used instead of Compound 201.

EXAMPLE 1-10

An organic light-emitting device was manufactured in the same manner asin Example 1-9, except that in forming a buffer layer, Compound 3 wasused instead of Compound 2, and in forming an electron transport layer,Compound 202 was used instead of Compound 201.

COMPARATIVE EXAMPLE 1-6

An organic light-emitting device was manufactured in the same manner asin Example 1-9, except that in forming an electron transport layer, Alq₃was used instead of Compound 201.

COMPARATIVE EXAMPLE 1-7

An organic light-emitting device was manufactured in the same manner asin Example 1-9, except that in forming a buffer layer, BCP was usedinstead of Compound 2.

EXAMPLE 2-1

An anode was manufactured by cutting a Corning 15 Ωcm² (1,200 Å) ITOglass substrate to a size of 50 mm×50 mm×0.7 mm, ultrasonically cleaningthe glass substrate by using isopropyl alcohol and pure water for 5minutes each, and then irradiating UV light for 30 minutes thereto andbeing exposed to ozone to clean. Then, the anode was loaded into avacuum deposition apparatus.

HT3 was vacuum deposited on the substrate to form a hole transport layerhaving a thickness of 600 Å. Then, MADN and FD1 were co-deposited at aweight ratio of 95:5 to form an emission layer having a thickness of 300Å.

Thereafter, Compound 2 was deposited on the emission layer to form abuffer layer having a thickness of 100 Å. Compound 201 and Liq wereco-deposited at a weight ratio of 50:50 on the buffer layer to form anelectron transport layer having a thickness of 300 Å, LiF was depositedon the electron transport layer to form an electron injection layerhaving a thickness of 10 Å, and Al was vacuum deposited to form acathode having a thickness of 2000 Å, thereby completing the manufactureof an organic light-emitting device.

EXAMPLE 2-2

An organic light-emitting device was manufactured in the same manner asin Example 2-1, except that in forming an electron transport layer,Compound 202 was used instead of Compound 201.

EXAMPLE 2-3

An organic light-emitting device was manufactured in the same manner asin Example 2-1, except that in forming an electron transport layer,Compound 203 was used instead of Compound 201.

EXAMPLE 2-4

An organic light-emitting device was manufactured in the same manner asin Example 2-1, except that in forming an electron transport layer,Compound 204 was used instead of Compound 201.

EXAMPLE 2-5

An organic light-emitting device was manufactured in the same manner asin Example 2-1, except that in forming a buffer layer, Compound 4 wasused instead of Compound 2.

EXAMPLE 2-6

An organic light-emitting device was manufactured in the same manner asin Example 2-1, except that in forming a buffer layer, Compound 4 wasused instead of Compound 2, and in forming an electron transport layer,Compound 202 was used instead of Compound 201.

EXAMPLE 2-7

An organic light-emitting device was manufactured in the same manner asin Example 2-1, except that in forming a buffer layer, Compound 4 wasused instead of Compound 2, and in forming an electron transport layer,Compound 203 was used instead of Compound 201.

EXAMPLE 2-8

An organic light-emitting device was manufactured in the same manner asin Example 2-1, except that in forming a buffer layer, Compound 4 wasused instead of Compound 2, and in forming an electron transport layer,Compound 204 was used instead of Compound 201.

COMPARATIVE EXAMPLE 2-1

An organic light-emitting device was manufactured in the same manner asin Example 2-1, except that in forming an electron transport layerwithout forming a buffer layer, Alq₃ was used instead of Compound 201and LiQ.

COMPARATIVE EXAMPLE 2-2

An organic light-emitting device was manufactured in the same manner asin Example 2-1, except that in forming an electron transport layer,Compound A was used instead of Compound 201.

COMPARATIVE EXAMPLE 2-3

An organic light-emitting device was manufactured in the same manner asin Example 2-1, except that in forming a buffer layer, BCP was usedinstead of Compound 2.

COMPARATIVE EXAMPLE 2-4

An organic light-emitting device was manufactured in the same manner asin Example 2-1, except that in forming an electron transport layer, Alq₃was used instead of Compound 201.

COMPARATIVE EXAMPLE 2-5

An organic light-emitting device was manufactured in the same manner asin Example 2-1, except that in forming an electron transport layer,Compound 201 was used instead of Compound 201 and LiQ.

Evaluation Example

The maximum efficiency and lifespan T90 (at a required condition ofbrightness 1500 nit) of organic light-emitting devices manufacturedaccording to Examples 1-1 to 1-12 and 2-1 to 2-8, and ComparativeExamples 1-1 to 1-7 and 2-1 to 2-5 were evaluated by using PR650Spectroscan Source Measurement Unit. (a product of PhotoResearch). T90means a period of time spent until brightness reduces to 90% of theinitial brightness. Results thereof are shown in Table 1 below.

TABLE 1 Buffer Electron Efficiency T90 Host layer transport layer (cd/A)(hr) Example 1-1 Compound — Compound Liq 43   161 1 201 Example 1-2Compound — Compound Liq 45   183 1 202 Example 1-3 Compound — CompoundLiq 39   155 1 203 Example 1-4 Compound — Compound Liq 47   178 1 204Example 1-5 Compound — Compound Liq 38   180 3 201 Example 1-6 Compound— Compound Liq 37   191 3 202 Example 1-7 Compound — Compound Liq 41  139 3 203 Example 1-8 Compound — Compound Liq 40   166 3 204 ComparativeSPPO — Alq₃ — 18    39 Example 1-1 Comparative SPPO — Compound Liq 26   38 Example 1-2 A Comparative SPPO — Compound Liq 32    71 Example 1-3201 Comparative Compound — Alq₃ Liq 23    90 Example 1-4 1 ComparativeCompound — Compound — 35    44 Example 1-5 1 201 Example 1-9 SPPOCompound Compound Liq 37   218 2 201 Example 1-10 SPPO Compound CompoundLiq 40   195 3 201 Example 1-11 SPPO Compound Compound Liq 37   187 2202 Example 1-12 SPPO Compound Compound Liq 39   190 3 202 ComparativeSPPO Compound Alq₃ Liq 35   101 Example 1-6 2 Comparative SPPO BCPCompound Liq 31    81 Example 1-7 201 Example 2-1 MADN Compound CompoundLiq 4.3 113 2 201 Example 2-2 MADN Compound Compound Liq 4.1 121 2 202Example 2-3 MADN Compound Compound Liq 4.2 108 2 203 Example 2-4 MADNCompound Compound Liq 4.2 130 2 204 Example 2-5 MADN Compound CompoundLiq 4.8  85 4 201 Example 2-6 MADN Compound Compound Liq 5.1  78 4 202Example 2-7 MADN Compound Compound Liq 4.9  91 4 203 Example 2-8 MADNCompound Compound Liq 4.7  87 4 204 Comparative MADN — Alq₃ — 3.3  19Example 2-1 Comparative MADN Compound Compound Liq 3.8  43 Example 2-2 2A Comparative MADN BCP Compound Liq 3.2  35 Example 2-3 201 ComparativeMADN Compound Alq₃ Liq 3.5  28 Example 2-4 2 Comparative MADN CompoundCompound — 3.6  31 Example 2-5 2 201

According to Table 1, it may be seen that the organic light-emittingdevices of Examples 1-1 to 1-12 and 2-1 to 2-8 had higher efficiency andlonger lifespan than the organic light-emitting devices of ComparativeExamples 1-1 to 1-7 and 2-1 to 2-5.

As described above, organic light-emitting devices according to the oneor more of the above embodiments may have high efficiency and longlifespan characteristics.

Example embodiments have been disclosed herein, and although specificterms are employed, they are used and are to be interpreted in a genericand descriptive sense only and not for purpose of limitation. In someinstances, as would be apparent to one of ordinary skill in the art asof the filing of the present application, features, characteristics,and/or elements described in connection with a particular embodiment maybe used singly or in combination with features, characteristics, and/orelements described in connection with other embodiments unless otherwisespecifically indicated. Accordingly, it will be understood by those ofskill in the art that various changes in form and details may be madewithout departing from the spirit and scope of the present invention asset forth in the following claims.

What is claimed is:
 1. An organic light-emitting device, comprising: afirst electrode; a second electrode; and an organic layer between thefirst electrode and the second electrode, wherein the organic layerincludes at least one first material and at least one second material,the first material being represented by one of Formulae 1-1 and 1-2,below, and the second material being represented by Formula 2, below:

(A₂₁)_(n21)-(A₂₂)_(n22)-(A₂₃)_(n23)-(A₂₄)_(n24)  <Formula 2> in Formulae1-1, 1-2, and 2, A₁₁ to A₁₄ are each independently selected from groupsrepresented by the following Formulae 9-1 to 9-12;

in Formulae 1-1, 1-2, 2, and 9-1 to 9-12, two adjacent ones of X₁₁ toX₁₈ are each independently a carbon atom corresponding to * in Formulae9-1 to 9-12; L₁₁ to L₁₃ are each independently selected from asubstituted or unsubstituted C₆-C₆₀ arylene group, a substituted orunsubstituted C₁-C₆₀ heteroarylene group, a substituted or unsubstituteddivalent non-aromatic condensed polycyclic group, and a substituted orunsubstituted divalent non-aromatic condensed heteropolycyclic group;a11 to a13 are each independently 0 or 1; R₁₁ and R₁₂ are eachindependently selected from a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₁-C₆₀ heteroaryl group, asubstituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted monovalentnon-aromatic condensed heteropolycyclic group; Y₁₁ and A₂₁ to A₂₄ areeach independently selected from a substituted or unsubstituted C₆-C₆₀aryl and a substituted or unsubstituted C₁-C₆₀ heteroaryl; at least oneselected from A₂₁ to A₂₄ being a substituted or unsubstituted C₁-C₆₀heteroaryl containing a nitrogen atom; n11 is selected from 1, 2, and 3;n21 to n24 are each independently selected from 0, 1, 2, and 3; the sumof n21, n22, n23, and n24 is 4 or more; X₉₁ is selected from an oxygenatom, a sulfur atom, C(Q₁)(Q₂), and N(Q₁); R₉₁ to R₉₃ are eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a substituted or unsubstituted C₁-C₆₀ alkyl group, asubstituted or unsubstituted C₂-C₆₀ alkenyl group, a substituted orunsubstituted C₂-C₆₀ alkynyl group, a substituted or unsubstitutedC₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀ cycloalkylgroup, a substituted or unsubstituted C₁-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₁-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthiogroup, asubstituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, and asubstituted or unsubstituted monovalent non-aromatic condensedheteropolycyclic group; b91 and b93 are each independently selected from1, 2, 3, and 4; b92 and b94 are each independently 1 or 2; b95 isselected from 1, 2, 3, 4, 5, and 6; and at least one of substituents ofthe substituted C₆-C₆₀ arylene group, the substituted C₁-C₆₀heteroarylene group, the substituted divalent non-aromatic condensedpolycyclic group, the substituted divalent non-aromatic condensedheteropolycyclic group, the substituted C₆-C₆₀ aryl group, thesubstituted C₁-C₆₀ heteroaryl group, the substituted monovalentnon-aromatic condensed polycyclic group, the substituted monovalentnon-aromatic condensed heteropolycyclic group, substituted C₁-C₆₀ alkylgroup, the substituted C₂-C₆₀ alkenyl group, the substituted C₂-C₆₀alkynyl group, the substituted C₁-C₆₀ alkoxy group, the substitutedC₃-C₁₀ cycloalkyl group, the substituted C₁-C₁₀ heterocycloalkyl group,the substituted C₃-C₁₀ cycloalkenyl group, the substituted C₁-C₁₀heterocycloalkenyl group, the substituted C₆-C₆₀ aryloxy group, thesubstituted C₆-C₆₀ arylthio group, the substituted C₆-C₆₀ aryl, andsubstituted C₁-C₆₀ heteroaryl is selected from: a deuterium, —F, —Cl,—Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group,an amidino group, a hydrazine group, a hydrazone group, a carboxylicacid group or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group; aC₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, anda C₁-C₆₀ alkoxy group, each substituted with at least one selected froma deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₃-C₁₀cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed hetero-polycyclic group, and —Si(Q₁₁)(Q₁₂)(Q₁₃);a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₁-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic heterocondensed polycyclic group; a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, and a monovalentnon-aromatic condensed hetero-polycyclic group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid group or a salt thereof, a phosphoric acidgroup or a salt thereof, a C₁-C₆₀ alkyl group, a C₁-C₆₀ alkenyl group, aC₁-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₁-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₁-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed hetero-polycyclic group, and —Si(Q₂₁)(Q₂₂)(Q₂₃); and—Si(Q₃₁)(Q₃₂)(Q₃₃), wherein Q₁, Q₂, Q₁₁ to Q₁₃, Q₂₁ to Q₂₃, and Q₃₁ toQ₃₃ are each independently selected from a C₁-C₆₀ alkyl group, a C₆-C₆₀aryl group, a C₁-C₆₀) heteroaryl group, a monovalent non-aromaticcondensed polycyclic group, and a monovalent non-aromatic condensedhetero-polycyclic group.
 2. The organic light-emitting device as claimedin claim 1, wherein L₁₁ to L₁₃ are each independently selected from: aphenylene group, a naphthylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a quinolinylene group, anisoquinolinylene group, a triazinylene group, a carbazolylene group, adibenzofuranylene group, and a dibenzothiophenylene group; and aphenylene group, a naphthylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a quinolinylene group, anisoquinolinylene group, a carbazolylene group, a dibenzofuranylenegroup, and a dibenzothiophenylene group, each substituted with at leastone selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitrogroup, a C₁-C₂₀ alkyl group, a phenyl group, and a naphthyl group. 3.The organic light-emitting device as claimed in claim 1, wherein L₁₁ toL₁₃ are each independently selected from a phenylene group, anaphthylene group, a pyridinylene group, a pyrazinylene group, apyrimidinylene group, a quinolinylene group, an isoquinolinylene group,a triazinylene group, a carbazolylene group, a dibenzofuranylene group,and a dibenzothiophenylene group.
 4. The organic light-emitting deviceas claimed in claim 1, wherein R₁₁ and R₁₂ are each independentlyselected from: a phenyl group, a naphthyl group, a pyridinyl group, apyrimidinyl group, a quinolinyl group, an isoquinolinyl group, aquinazolinyl group, and a triazinyl group; and a phenyl group, anaphthyl group, a pyridinyl group, a pyrimidinyl group, a quinolinylgroup, an isoquinolinyl group, a quinazolinyl group, and a triazinylgroup, each substituted with at least one selected from a deuterium, —F,—Cl, —Br, —I, a methyl group, a phenyl group, and a naphthyl group. 5.The organic light-emitting device as claimed in claim 1, wherein R₁₁ andR₁₂ are each independently a group represented by one of Formulae 4-31to 4-38 below:

wherein, in Formulae 4-31 to 4-38, Z₁ is a hydrogen, a deuterium, —F,—Cl, —Br, —I, a methyl group, a phenyl group, or a naphthyl group; d1 isselected from 1, 2, 3, 4, and 5; and d2 is selected from 1, 2, 3, 4, 5,6, and 7; d3 is selected from 1, 2, 3, and 4; d4 is selected from 1, 2,and 3; d5 is selected from 1, 2, 3, 4, 5, and 6; d6 is selected from 1and 2; and * indicates a binding site to a neighboring atom.
 6. Theorganic light-emitting device as claimed in claim 1, wherein R₁₁ and R₁₂are each independently a group represented by one of Formulae 5-31 to5-37 below:

wherein, in Formulae 5-31 to 5-37, * indicates a binding site to aneighboring atom.
 7. The organic light-emitting device as claimed inclaim 1, wherein Y₁₁ is selected from: a benzene group, a naphthalenegroup, a pyridine group, a pyrimidine group, a quinoline group, anisoquinoline group, a quinazoline group, and a triazine group; and abenzene group, a naphthalene group, a pyridine group, a pyrimidinegroup, a quinoline group, an isoquinoline group, a quinazoline group,and a triazine group, each substituted with at least one selected from aphenyl group and a naphthyl group.
 8. The organic light-emitting deviceas claimed in claim 1, wherein Y₁₁ is a triazine group substituted withat least one selected from a benzene group and a phenyl group.
 9. Theorganic light-emitting device as claimed in claim 1, wherein: A₂₁ to A₂₄are each independently selected from: a benzene, a naphthalene, apyridine, a pyrimidine, a quinoline, an isoquinoline, a quinazoline, anda triazine; a benzene, a naphthalene, a pyridine, a pyrimidine, aquinoline, an isoquinoline, a quinazoline, and a triazine, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, a phenyl group,a naphthyl group, a pyridyl group, a pyrimidyl group, and a triazinylgroup; and a benzene, a naphthalene, a pyridine, a pyrimidine, aquinoline, an isoquinoline, a quinazoline, and a triazine, eachsubstituted with at least one selected from a phenyl group, a naphthylgroup, a pyridyl group, a pyrimidyl group, and a triazinyl group, whichare each substituted with at least one selected from a deuterium, —F,—Cl, —Br, —I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, aphenyl group, a naphthyl group, a pyridyl group, a pyrimidyl group, anda triazinyl group; and at least one of A₂₁ to A₂₄ is selected from: apyridine, a pyrimidine, a quinoline, an isoquinoline, a quinazoline, anda triazine; a pyridine, a pyrimidine, a quinoline, an isoquinoline, aquinazoline, and a triazine, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, aC₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, a pyridyl group, apyrimidyl group, and a triazinyl group; a pyridine, a pyrimidine, aquinoline, an isoquinoline, a quinazoline, and a triazine, eachsubstituted with at least one selected from a phenyl group, a naphthylgroup, a pyridyl group, a pyrimidyl group, and a triazinyl group, eachsubstituted with at least one selected from a pyridyl group, a pyrimidylgroup, and a triazinyl group; and a pyridine, a pyrimidine, a quinoline,an isoquinoline, a quinazoline, and a triazine, each substituted with atleast one selected from a pyridyl group, a pyrimidyl group, and atriazinyl group, which are each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, aC₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, a pyridyl group, apyrimidyl group, and a triazinyl group.
 10. The organic light-emittingdevice as claimed in claim 1, wherein: A₂₁ to A₂₄ are each independentlyselected from: a benzene, a pyridine, a pyrimidine, a quinoline, anisoquinoline, a quinazoline, and a triazine; and a benzene, a pyridine,a pyrimidine, a quinoline, an isoquinoline, a quinazoline, and atriazine, each substituted with at least one selected from a deuterium,—F, —Cl, —Br, —I, a cyano group, a nitro group, a methyl group, an ethylgroup, an n-propyl group, an iso-propyl group, an n-butyl group, aniso-butyl group, a sec-butyl group, a tert-butyl group, a phenyl group,and a pyridyl group; and at least of A₂₁ to A₂₄ is selected from: apyridine, a pyrimidine, a quinoline, an isoquinoline, a quinazoline, anda triazine; and a pyridine, a pyrimidine, a quinoline, an isoquinoline,a quinazoline, and a triazine, each substituted with at least oneselected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitrogroup, a methyl group, an ethyl group, an n-propyl group, an iso-propylgroup, an n-butyl group, an iso-butyl group, a sec-butyl group, atert-butyl group, a phenyl group, and a pyridyl group.
 11. The organiclight-emitting device as claimed in claim 1, wherein: A₂₁ to A₂₄ areeach independently selected from: a benzene, a pyridine, a pyrimidine, aquinoline, an isoquinoline, a quinazoline, and a triazine; and abenzene, a pyridine, a pyrimidine, a quinoline, an isoquinoline, aquinazoline, and a triazine, each substituted with at least one selectedfrom a cyano group, a methyl group, a phenyl group, and a pyridyl group;and at least one of A₂₁ to A₂₄ is selected from: a pyridine, apyrimidine, a quinoline, an isoquinoline, a quinazoline, and a triazine;and a pyridine, a pyrimidine, a quinoline, an isoquinoline, aquinazoline, and a triazine, each substituted with at least one selectedfrom a cyano group, a methyl group, a phenyl group, and a pyridyl group.12. The organic light-emitting device as claimed in claim 1, wherein n11is 1 or
 3. 13. The organic light-emitting device as claimed in claim 1,wherein: n21 to n24 are each independently 1 or 2; and a sum of n21,n22, n23, and n24 is selected from 4, 5, 6, and
 7. 14. The organiclight-emitting device as claimed in claim 1, wherein: the first materialis a compound represented by one of Formulae 1-1A, 1-1B, 1-1C, and 1-2A, and the second material is a compound represented by one of Formulae2A and 2B:

wherein in Formulae 1-1A, 1-1B, 1-1C, 1-2A, 2A, and 2B, Y₁₁, L₁₁, L₁₂,a11, a12, R₁₁, and R₁₂ are the same as defined in Formulae 1-1 and 1-2;Q₁, R₉₁, R₉₃, b91, b92, and b93 are the same as defined in Formulae 9-1to 9-12; L₁₃ is the same as defined in connection with L₁₁ in Formula1-1; a13is the same as defined in connection with a13 in Formula 1-1;X₂₁ is CR₂₁ or N; X₂₂ is CR₂₂ or N; X₂₃ is CR₂₃ or N; L₂₁ to L₂₄ areeach independently selected from: a phenylene group, a naphthalenylgroup, a pyridinylene group, a pyrimidinylene group, and a triazinylenegroup; a phenylene group, a naphthalenyl group, a pyridinylene group, apyrimidinylene group, and a triazinylene group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, anitro group, a C₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, apyridyl group, a pyrimidyl group, and a triazinyl group; and a phenylenegroup, a naphthalenyl group, a pyridinylene group, a pyrimidinylenegroup, and a triazinylene group, each substituted with at least oneselected from a phenyl group, a naphthyl group, a pyridyl group, apyrimidyl group, and a triazinyl group, which are each substituted withat least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group,a nitro group, a C₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, apyridyl group, a pyrimidyl group, and a triazinyl group; a21 to a24 areeach independently 0 or 1; R₂₁ to R₂₇ are each independently selectedfrom: a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, aC₁-C₂₀ alkyl group, a phenyl group, a naphthyl group, a pyridyl group, apyrimidyl group, and a triazinyl group; and a phenyl group, a naphthylgroup, a pyridyl group, a pyrimidyl group, and a triazinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a cyano group, a nitro group, a C₁-C₂₀ alkyl group, a phenyl group,a naphthyl group, a pyridyl group, a pyrimidyl group, and a triazinylgroup.
 15. The organic light-emitting device as claimed in claim 1,wherein: the first material includes a compound represented by thefollowing Formula 1-1B, and the second material includes a compoundrepresented by any one of the following Formulae 2A-1 to 2A-5 and 2B-1to 2B-5:

wherein, in Formulae 1-1B, 2A-1 to 2A-5, and 2B-1 to 2B-5, Y₁₁, L₁₁, anda11 are the same as defined in Formula 1-1; Q₁, R₉₁, R₉₃, b91, and b93are the same as defined in Formulae 9-1 to 9-12; and L₂₁ to L₂₄, a21 toa24, and R₂₁ to R₂₇ are the same as defined in Formulae 2A and 2B. 16.The organic light-emitting device as claimed in claim 1, wherein: thefirst material is selected from Compounds 1 to 173, below; and thesecond material is selected from Compounds 201 to 304, below:


17. The organic light-emitting device as claimed in claim 1, wherein:the organic layer includes an emission layer and an electron transportregion between the second electrode and the emission layer, the electrontransport region including an electron transport layer, the emissionlayer includes at least one first material, and the electron transportlayer includes at least one second material.
 18. The organiclight-emitting device as claimed in claim 17, wherein the emission layeris adjacent to the electron transport layer.
 19. The organiclight-emitting device as claimed in claim 1, wherein: the organic layerincludes an emission layer and an electron transport region between thesecond electrode and the emission layer, the electron transport regionincluding an electron transport layer and a buffer layer, the bufferlayer includes at least one first material, and the electron transportlayer includes at least one second material.
 20. The organiclight-emitting device as claimed in claim 19, wherein the buffer layeris adjacent to the electron transport layer.